DRAFT EDIT, 3 MAY 2002
THE COSTS OF DRUG ABUSE AND DRUG POLICY
Prepared For The Senate Special Committee On Illegal Drugs
Antony G. Jackson
Economics Division
22 April 2002
LIBRARY OF PARLIAMENT
INTRODUCTION
ECONOMIC COST STUDIES
A. Illicit Drug Costs in Canada
1. Productivity Losses
2. Law Enforcement Costs
3. Health Care Costs
4. Prevention and Research
5. Other Direct Costs
6. Direct Losses in the Workplace
7. Administrative Costs for Transfer
Payments
B. The CCSA Partial Update to 1995
C. Illicit Drug Costs in the United States
D. Illicit Drug Costs in France
1. Health Costs
2. Public Administration Costs
3. Income and Production Losses
4. Government Revenue Losses
5. Spending by Private Agencies
6. Discussion
E. Critiques and Rejoinders
1. Peter Reuter – Are Calculations of the Economic Costs
of Drug Abuse Either Possible or Useful?
2. Mark A.R. Kleiman – “Economic Cost” Measurements,
Damage Minimization and Drug Abuse Control Policy
3. Pierre Kopp – Economic Costs Calculations and
Drug Policy Evaluation
4. Mark A. Cohen – Alcohol, Drugs and Crime: Is “Crime” Really One-Third of the
Problem?
5. Eric Single and Brian Easton – Estimating the Economic Costs of Alcohol
Misuse
F. Discussion
COST-EFFECTIVENESS STUDIES
A. Controlling Cocaine: Supply versus Demand
Programs
1. Supply
2. Demand
B. The National Research Council Analysis of the RAND Study
C. The RAND Response
D. Discussion
CONCLUSION
REFERENCES
Estimating the cost of a complicated issue such as drug abuse involves
some difficult technical economic questions.
Exactly which aspects of the problem should be included in the
estimate? How should each cost
element be measured? This paper
will discuss examples of two types of studies: pure (economic) cost studies,
and cost-effectiveness studies. Each
type attracts a certain amount of controversy.
The controversies surrounding cost studies concern the choice of which
items to include, which items are left out because of a lack of data, the way
in which the items are costed, and the effect of these factors on the quality
of the results. The controversies
surrounding cost-effectiveness studies focus on the way the market for illicit
drugs is modelled and the various equations are chosen.
Because addiction problems affect health, the cost of illness (COI)
model has been advocated as a method of costing drug abuse.
In making health-care decisions, it is natural to ask how much society
would save if a particular illness were eradicated.
The cost savings are measured by comparing the current situation, in
which some people suffer from a specific illness, to a hypothetical
alternative situation in which everyone is cured.
Cost savings would be achieved in various ways, such as through the
reduced demand for healthcare, and through avoiding illness-related loss of
productivity and earnings.
Applying the COI approach to drug abuse, however, raises the difficult
question of what hypothetical alternative to the current situation should be
used in the costing exercise. The
opposite of an illness is health, and complete eradication of a disease may be
a realistic and feasible target. But in the case of drug abuse this may not be
a realistic and feasible target, because drug usage – unlike illness – is
self-inflicted and buoyed by the forces of addiction.
Many analysts have argued that abolitionist policies, be they for
heroin, alcohol or any other drug, have never worked and will never work.
Moreover, it is not clear whether COI figures can be scaled down to
provide useful analyses of partial reductions in drug usage.
The economic costs measured in COI studies are total costs, and can be
quite easily converted into average costs by division. For the purpose of
policy analysis, however, marginal costs are needed, because policy changes
are made at the margin, starting at current levels of drug abuse, treatment
levels and policing effort.
The cost implications of such marginal changes may be difficult to
determine. If, for example, a law
enforcement crackdown on drug usage resulted in more drug offenders being
imprisoned, one consequence would be an increase in the number of prison cells
required. The cost of providing
those marginal cells could be sensibly estimated from the average cost of
existing cells. One prison cell
presumably costs about the same as another similar unit, no matter which type
of offender it currently houses apart from issues of security levels.
Estimating the marginal cost of arresting more drug offenders,
however, by the average cost of all existing arrests would not be sensible.
The average cost of an arrest combines costs of fraud, traffic
infractions and murder, and it is reasonable to assume that the police
resources required vary widely, depending on the nature of each case.
Nor would it be safe to assume the marginal costs of making an arrest
are constant. Presumably many of
the drug offenders who are currently caught are less skilled than those who
are undetected – which, to the economist, points to increasing marginal
costs – and undetected ones require more police effort to catch them.
A second concern with the use of zero consumption as the hypothetical
alternative situation in the COI methodology is based on the fact that drug
use is a choice. The use of an
illegal drug meets some needs in the user, and it is an open question what
would happen if an illicit drug were no longer consumed.
Would these needs still exist and be met in another way
– such as increased consumption of alcohol or legally available
solvents – or would they be transformed into less harmful channels, or into
total abstinence?
The
first part of this paper discusses economic cost studies, drawing on studies
of Canada, the United States and France.
A summary of four experts’ critical analyses of the U.S. study is
also included.
The
second part of the paper outlines a famous U.S. cost-effectiveness study that
aimed to assess whether it would be cheaper to reduce cocaine consumption by
tougher law enforcement or by more drug treatment programs.
A summary of the U.S. National Research Council’s critical assessment
of this study is also included.
A. Illicit Drug Costs in
Canada
A major study of drug abuse in Canada was undertaken by the Canadian
Centre on Substance Abuse (CCSA), an agency that has been at the forefront
internationally in studies of this problem.
The Centre held a symposium in Banff in May 1994 to discuss issues in
estimating the social and economic costs of substance abuse, and to develop
international guidelines for such studies.
The intention was to help countries to compare their drug problems and
the effectiveness of their policies within a common framework.
The CCSA study was published in 1996,([1])
and illustrates the approach recommended in the international guidelines
(which were updated in 2001).
Before dealing with the fine details of cost estimation, it is useful
to see the CCSA’s
broad picture of
costs imposed on Canadian society by illicit drug abuse in 1992.
TABLE 1
ESTIMATED
COSTS OF ILLICIT DRUG ABUSE IN CANADA, 1992
|
||
SOURCE
|
$M
|
%
|
|
Productivity
losses |
823.1 |
60.0 |
|
Law
enforcement costs |
400.3 |
29.2 |
|
Health
care costs |
88.0 |
6.4 |
|
Prevention
and research |
41.9 |
3.1 |
|
Other
direct costs |
10.7 |
0.8 |
|
Direct
losses in the workplace |
5.5 |
0.4 |
|
Administrative
costs for transfer payments |
1.5 |
0.1 |
TOTAL
|
1371.0 |
100.0 |
Source:
Eric Single, Lynda Robson et
al.
By far the largest item in this table is the cost of productivity
losses. This is the estimated
value of the loss of output, as usually measured by earnings and wages,
resulting from illness and early death induced by drug abuse.
Productivity losses are an indirect cost that would not show up in the
national accounts or the spending estimates of government departments. The
other costs listed in the table are direct costs borne by government, other
agencies and employers. Law
enforcement costs consist of the costs of police, the courts and the
corrections system. Health care
costs consist of hospital, ambulance and residential care charges,
physicians’ fees and prescription drug costs.
Table 1 underlines the argument that the largest estimated cost of drug
abuse is related to the harm those drugs do to individual lives.
It should be noted, however, that Canada spends nearly ten times as
much on law enforcement for drug offences as on prevention and research.
The study follows the COI approach, which attempts to measure the
external costs borne by people other than the drug user for treatment,
prevention, research and law enforcement, plus productivity losses caused by
increased ill health and death. The
report estimates that illicit drug use cost Canadian society $1,371M in 1992,
or 0.2% of Canada’s GDP. This
cost is considerably less than the amounts estimated in the study for the
abuse of alcohol (1.09% of GDP) or tobacco (1.39% of GDP).
The following section explains how
the CCSA arrived at the totals listed in Table 1.
In more detail, productivity dollar losses are estimated as follows:
Productivity losses due to mortality
$547.4M
Productivity losses due to morbidity
$275.7M
Total productivity losses
$823.1M
Productivity losses due to crime are not estimated.
These productivity losses are calculated based on the Centre’s
estimates of the number of people who died in 1992 from illicit drugs,
including their gender and age:
Estimated illicit drug-related deaths
male
641
female
91
total
732
Estimated years of potential life lost
male
27,044
female
4,103
The 732 deaths result in an estimated 31,147 years of life being lost.
This averages out to 42.6 years per person.
Unfortunately, death from illicit drug use strikes younger victims who
have a lot of life unlived.
Making the assumption that those who died early would have earned the
average wage rates with average fringe benefits for their age and gender for
the rest of their working lives, lost earnings can be calculated.
The value of lost housekeeping services is added.
The present value of future earnings is computed for each age and
gender group by discounting, at an appropriate rate, the value of future
earnings, fringe benefits and housekeeping services.
These figures are totalled to give a final estimated value of $547.4M.
The productivity loss resulting from morbidity or illness from illicit
drug abuse is calculated as the difference between the mean annual earned
income of people who are drug users and that of the general population.
The value of lost housekeeping services and fringe benefits is added,
for a total estimate of $275.7M.
In more detail, law enforcement costs were estimated as:
Police
$208.3M
Courts
$59.2M
Corrections
(including probation)
$123.8M
Customs
and Excise
$9.0M
Total
law enforcement costs
$400.3M
Law enforcement costs resulting from illicit drug abuse consist of the
costs for specialized law agencies such as the (then) RCMP Narcotics Division,
plus that fraction of the general costs of operations that can be attributed
to dealing with illicit drug crimes. Such
crimes include both direct violations of the drug laws and also that
proportion of general crimes that can reasonably be attributed to illicit
drugs.
Data exist on the proportion of homicide and assault cases in which the
perpetrator was under the influence of illicit drugs.
The Centre estimates the proportion of those cases where the assault or
homicide could be causally attributed to the drug intoxication of the
perpetrator. Putting these two
together, the Centre estimated that 8% (0.0807) of violent crimes are
attributable to illicit drugs in Canada.
There is no such figure for property crimes.
The measure of police output is the offence.
Offences are officially recorded and centrally reported violations of
criminal law. To estimate
policing costs, total policing expenditures as reported by Statistics Canada
are multiplied by the percentage of offences that are estimated to be
drug-related. The Centre
concludes that in 1992, 2.4% of all offences were attributable to illicit drug
use.
Policing
costs of enforcing federal drug laws
$168.4M
Policing
costs of 8% of violent crimes
$39.9M
Total
policing costs
$208.3M
For the courts, the measure of output is the case.
Costs are measured to include staff wages and salaries, building costs,
and legal aid. The Centre
concludes that in 1992, 5.7% of criminal court cases were attributable to
illicit drug use.
Court
costs of federal drug laws
$46.8M
Court
costs of 8% of violent crimes
$12.4M
Total
court costs
$59.2M
Corrections costs include the costs of prisons, the probation system
and the parole system. In the
jail system, costs are allocated on the basis of sentences.
Corrections
costs for federal drug laws
$106.2M
Corrections
costs for 8% of violent crimes
$17.6M
Total
corrections costs
$123.8M
The Customs and Excise figure excludes programs financed under the Drug
Strategy.
3. Health Care Costs
The detailed health care costs are as follows:
Morbidity
- general hospitals
$34.0M
Morbidity
- psychiatric hospitals
$4.3M
Co-morbidity
$4.7M
Ambulance
services
$1.1M
Residential
care
$20.9M
Non-residential
treatment
$7.9M
Ambulatory
care: physicians’ fees
$8.0M
Prescription
drugs
$5.8M
Other
health care costs
$1.3M
Total
health care costs
$88.0M
Data on hospitalizations from the Laboratory Centre for Disease Control
are used to find the number of cases in which illicit drug abuse was the
primary diagnosis. These data are
given below.
Number of drug-related hospitalizations
male
4,345
female
2,750
total
7,095
Hospitalization days
male
36,536
female
22,035
total
58,571
The total is multiplied by the average per diem cost for a general
hospital, for a total of $34M. A
similar procedure is followed for psychiatric hospitals using the Mental
Health Statistics, for a total of $4.3M.
Co-morbidity costs occur when drug abuse is not the primary diagnosis
but extra days of treatment are required because drug abuse has complicated
the primary condition. Using data
for Ontario hospitals, the average stay for patients with a particular disease
who were drug abusers is compared to the average for those who were not.
The average length of stay for co-morbid patients with a secondary
diagnosis of illicit drug use is 11.3 days, compared to 9.0 days for patients
who did not use drugs – an additional 2.3 days on average.
The total additional days for Canada are estimated and multiplied by
the average per diem to give $4.7M.
The cost of ambulance services is estimated by multiplying the total
cost of ambulance services by the fraction of total hospital days attributed
to illicit drugs, to give $1.1M.
Statistics Canada reports residential care costs for alcohol and drug
treatment combined. The Centre
applies the ratio of alcohol to drug treatment days in psychiatric hospitals
to split total residential care costs, giving $20.9M.
Non-residential treatment costs were not measured nationwide
officially. The Centre took the
available provincial figures from Alberta, Ontario and Manitoba, and scaled
these up for a national estimate of $90M.
A portion of this total is then attributed to alcohol and drug
residential treatment, on the basis of hospital days with primary diagnoses of
alcohol and drug abuse; the resulting estimate is $7.9M.
Ambulatory care costs consist of physicians’ fees and other
professional fees. Because
a breakdown of fees by diagnosis was not available nationally, the CCSA had a
tabulation run by Manitoba Health. The
proportion of total Manitoba physicians’ fees attributable to illicit drug
use is 0.1%. Applying this to the
national total for physicians’ fees yields an estimate of $8M, of which $5M
is for males and $3M for females. Other
professional services, such as those of dentists, chiropractors, optometrists,
podiatrists, osteopaths, naturopaths, private-duty nurses and
physiotherapists, psychologists and psychotherapists, are excluded from this
figure because of a lack of information.
The Laboratory Centre for Disease Control ran special tabulations to
connect prescribed drugs and diseases. The
CCSA then used its estimates of what percentage of a particular disease could
be attributed to illicit drugs to find the amount of drug costs that could be
attributed to illicit drugs. This
percentage is about 1% of overall prescription drug charges, or $5.8M.
Other health care costs are divided on the basis of the proportion of
hospital days attributable to illicit drugs.
Household help and special rehabilitation equipment costs are not
included in the estimate for other health care costs because of lack of data.
Other health care costs are estimated to be $1.3M.
4. Prevention and Research
The breakdown of costs for prevention and research is as follows:
Research
$5.0M
Prevention programs
$36.7M
Training costs for physicians
$0.2M
Total
$41.9M
These prevention and research estimates include an attributable portion
of the costs of research on disorders that are partially attributable to
illicit drugs. Prevention costs
are mainly for programs. Medical
training costs are based on the proportion of undergraduate medical training
devoted to drug issues. Training
costs for nurses are not measured. There
was no available estimate of the costs of averting behaviour attributable to
illicit drugs, such as through programs aimed at fire prevention and crime
prevention.
5. Other Direct Costs
Other direct costs consist of traffic and fire damage:
Traffic accident damage
$10.7M
Working from the proportion of motor vehicle fatalities attributed to
illicit drugs, 0.35% of motor
vehicle accident damage is attributed to illicit drug use.
No estimate of drug-related fire damage was available.
6. Direct Losses in the
Workplace
Direct losses in the workplace are estimated as follows:
Employee Assistance Programs
and health
promotion programs
$3.5M
Drug testing in the workplace
$2.0M
Total
$5.5M
Estimates of spending on Employee Assistance and health promotion
programs were available only for Ontario, and were scaled up to cover all
Canada. The only drug testing
cost included is Health Canada spending in 1992.
There are no estimates of the private cost of workplace drug testing in
Canada, but 4% of Ontario workplaces had some form of drug screening in 1994.
7. Administrative Costs
for Transfer Payments
The administrative costs for transfer payments cover social welfare and
other programs, workers’ compensation, and other administrative costs:
Social welfare and other programs
N/A
Workers’ compensation
$1.5M
Other administrative costs
N/A
Total
$1.5M
Administrative costs for workers’ compensation payments attributable
to drug abuse are based on the fraction for non-fatal occupational and machine
accidents attributed to illicit drugs. This
fraction was 0.155%. No figure
was given for the proportion of the administrative costs for unemployment and
dependence on social assistance attributable to drug abuse.
The study uses a figure of 0.5% for alcohol, and the authors presumably
thought the fraction for drug abuse was too low to measure.
Other administrative costs include group life insurance, private
insurance, widow’s bonus under the Canada Pension Plan, extra disability
pension due to retirement for health reasons, and payroll taxes that finance
pension, sick leave and disability attributable to substance abuse.
Insufficient information was available to permit the attribution of
part of these costs to drug abuse.
B. The CCSA Partial Update
to 1995
In 2000, Eric Single, Jürgen Rehm, Lynda Robson and Minh Van Truong
published an update of the original CCSA study to a year 1995 basis.([2])
The update was limited to the health data used in the study, rather
than the economic costs. The same
relative risk numbers were used in the update; the prevalence numbers were
updated for alcohol and tobacco, but not for opiates and cocaine.
Because the prevalence numbers for illicit drug use did not change, the
etiologic fractions in the 1995 update remained very close to those of 1992,
which are listed in Table 2 below.
TABLE
2
|
ETIOLOGIC
FRACTIONS FOR SOME CONDITIONS PARTIALLY ATTRIBUTABLE TO USE OF
ILLICIT DRUGS IN CANADA, 1992 |
||||||
|
Condition |
Associated
Drug |
Outcome;
Sex; Etiologic Fraction |
Age Range |
|||
|
Mortality |
Morbidity |
|||||
|
M |
F |
M |
F |
|||
|
Suicide
and self-inflicted injury |
Various |
0.14 |
0.03 |
N/A |
N/A |
15–49 |
|
AIDS |
|
|
|
|
|
|
|
<
15 years |
IV |
0.13 |
0.13 |
0.13 |
0.13 |
<
15 |
|
|
IV |
0.04 |
0.13 |
0.04 |
0.13 |
|
|
Victim
of assault |
Various |
0.14 |
0.03 |
0.08 |
0.03 |
15–49 |
|
Motor
vehicle accidents |
Various |
0.02 |
0.00
|
0.02 |
0.00
|
15–49 |
Source:
Eric Single, Lynda Robson et
al.
It should be noted that only hard drugs are considered.
The etiologic fractions are then used for a breakdown of the 1995
incidence figures. The number of
hospitalizations and the number of deaths attributable to illicit drugs are
given in Tables 3 and 4 below. The
data in these tables underline the greater incidence of drug-related problems
among males.
TABLE
3
NUMBER
OF HOSPITALIZATIONS DUE TO ILLICIT DRUGS
IN
CANADA, 1995
|
|||
|
Causes |
No.
of Hospitalizations
|
||
|
M |
F |
Total |
|
|
Opiate
poisoning |
266 |
245 |
511 |
|
AIDS
|
140 |
54 |
194 |
|
Cocaine
poisoning |
124 |
62 |
186 |
|
Poisoning,
intent unknown |
0 |
0 |
0 |
|
Victim
of assault |
922 |
53 |
975 |
|
Motor
vehicle accidents |
257 |
0 |
257 |
|
Other
conditions |
2,827 |
1,980 |
4,817 |
|
Total
attributed to illicit drugs |
4,536 |
2,394 |
6,940 |
Source:
Eric Single, Jürgen Rehm et
al.
TABLE
4
|
NUMBER
OF DEATHS AND POTENTIAL YEARS OF LIFE LOST DUE TO ILLICIT DRUGS IN
CANADA, 1995 |
||||||
|
Causes |
No.
of Deaths
|
Potential
Years of Life Lost |
||||
|
M |
F |
Total |
M |
F |
Total |
|
|
Suicide,
self-inflicted injury |
313 |
15 |
329 |
13,591 |
768 |
14,359 |
|
Opiate
poisoning |
129 |
31 |
160 |
4,908 |
1,378 |
6,286 |
|
AIDS |
66 |
17 |
83 |
2,485 |
733 |
3,213 |
|
Cocaine
poisoning |
65 |
13 |
78 |
2,718 |
654 |
3,372 |
|
Poisoning,
intent unknown |
34 |
23 |
57 |
1,109 |
801 |
1,910 |
|
Victim
of assault |
34 |
3 |
37 |
1,469 |
152 |
1,621 |
|
Motor
vehicle accidents |
29 |
0 |
29 |
1,349 |
0 |
1,349 |
|
Other
conditions |
21 |
7 |
32 |
1,081 |
471 |
1,552 |
|
Total
attributed to illicit drugs |
691 |
109 |
805 |
28,710 |
4,957 |
33,662 |
Source:
Eric Single, Jürgen Rehm et
al.
C. Illicit Drug Costs in
the United States
In 1998, the U.S. National Institutes of Health published a study by
Henrick J. Harwood, Douglas Fountain and Gina Livermore, HFL.([3])
This
study has been subject to considerable expert debate which is summarized later
in this report, so only an overview will be given here.
The HFL study follows the COI approach.
It assumes that drug abuse causes resources to be diverted from other
uses, and that the appropriate cost of drug abuse is the cost of these
resources. It should be pointed
out that the study follows the common methodology adopted for official U.S.
government health studies. The
advantage, in theory at least, for health studies is that policy makers can
take studies of two diseases or illnesses and compare them to see if the right
amount of health resources is being allocated to the treatment of each
disease.
Economic losses from premature deaths caused by overdosing are measured according to the human capital approach. Unrealized future earnings are forecast and discounted back to a present value. The results are summarized in Table 5 below.
TABLE
5
|
ECONOMIC
COSTS OF DRUG ABUSE IN THE UNITED STATES, 1992 |
||
|
ECONOMIC
COSTS |
US$
M |
% |
|
Health
Care Expenditures |
|
|
|
Drug
abuse services |
4,400 |
4.5% |
|
Medical
consequences |
5,531 |
5.7% |
|
Total
Health Care Expenditures |
9,931 |
10.2% |
|
Productivity
Effects (Lost Earnings) |
|
|
|
Premature
death |
14,575 |
14.9% |
|
Impaired
productivity |
14,205 |
14.5% |
|
Institutionalized
populations |
1,477 |
1.5% |
|
Incarceration |
17,907 |
18.3% |
|
Crime
careers |
19,198 |
19.7% |
|
Victims
of crime |
2,059 |
2.1% |
|
Total
Productivity Effects |
69,421 |
71.1% |
|
Other
Effects on Society |
|
|
|
Crime |
17,970 |
18.4% |
|
Social
welfare administration |
337 |
0.3% |
|
Motor
vehicle crashes |
- |
|
|
Fire
destruction |
- |
|
|
Total
Other Effects on Society |
18,307 |
18.7% |
|
Total |
97,659 |
100% |
Source :
Henrick J. Harwood, Douglas Fountain et al.
The largest cost item is loss of productivity, which makes up 71.1% of
all costs. Health costs are
mainly related to hard drug use by injection and HIV/AIDS problems.
A small item for HIV babies is included in the detailed tabulations.
The study attempts to allocate the costs of drug abuse, finding that
46% is borne by the government (through the criminal justice, health and
social services systems), while private insurance bears 3% of costs.
The remaining half falls on the shoulders of abusers themselves and
their families in the form of lowered earnings and reduced household
production.
D. Illicit Drug Costs in
France
In 2000, the Observatoire français des drogues et des toxicomanies
published a study by Pierre Kopp and Philippe Fenoglio, KF.([4])
The authors of the study are primarily interested in the social costs
of drugs – in their terms, the costs borne by the community.
As in all countries, the illegality of drugs reduced the amount of data
available for analysis; the study seems to have been slightly hampered also by
a lower quantity and quality of data available through public reporting and
the administrative documents of public agencies, such as annual estimates.
The results are presented in Table 6 below. According
to this study, in 1995, 15.8% of people between the ages of 18 and 75 had used
an illicit drug during their lifetime, with 4.4% using one in the past year.
Males are more likely to declare drug use than females in surveys.
The average age for first trying cannabis is 16.
Between 23 and 30% of young people have used drugs.
Cannabis is by far the most common drug among the young, and young
males are more likely to have used it by about 10 percentage points than
young females. The prevalence of
solvent inhalation is between 1 and 6%, and ecstasy perhaps 3%.
The cannabis spending data comes from assuming consumption rates for
the qualitative consumption ranges used in surveys.
For example, daily smokers are assumed to be using 0.5 grams per day,
people who consume at least once a week are assumed to consume 1.5 grams per
week. At an average price of Fr
35 per gram, total spending on cannabis is estimated at Fr 4,405.5M.
Heroin spending is estimated at Fr 4,600M, and cocaine spending is in
the range of Fr 3,000-10,000M. % Health
costs (1) 11.42 Public
administration costs 36.37 Income
and production losses (2) including : 45.69 -
losses by individuals 13.29 -
loss of production in the workplace 32.39 Government
revenue losses (2) 6.49 Spending
by private agencies N/A Other
drug-related costs 0.04 Total 100.00 Notes:
(1) Health costs include only costs attributable to HIV/AIDS
treatment and for treatment using Subutex.
(2) Income and production losses and government revenue
losses include only premature
deaths from HIV/AIDS that are attributable to drug abuse, premature
deaths from overdosing, and incarceration under drug legislation.
Source:
Pierre Kopp and Philippe Fenoglio.
1.
Health Costs
Estimating the health costs attributable to drug abuse is always
difficult. KF face an array of
data problems. Hepatitis C, for
example, was not treated as a separate disease category for recording
purposes.
AIDS is strongly linked to injection drug use, with about 25% of new
cases in France in 1995 arising from injection drug use.
The costs of HIV and AIDS treatments are derived from health ministry
data. From these figures and from
estimates of the number of HIV and AIDS patients who were drug users, the
total costs of HIV/AIDS attributable to drug use can be calculated as Fr
575.24M and Fr 349.27M, respectively. Subutex,
based on buprenorphine, is a morphine replacement, apparently a treatment of
choice in France. From the
hypothesis that 40,000 individuals are under this treatment, the estimated
cost of Fr 600M is derived.
2. Public Administration
Costs
For the judicial system, KF have data on the proportion of court cases
that involve drug laws. The total
costs of the various types of court (including salaries for judges,
magistrates, clerks and officials, as well as administrative and building
costs) are prorated by the amount of drug activity handled.
The resulting amount totals Fr 99.943M in 1995.
Penal service costs are estimated from the proportion of those
incarcerated for drug offences. In
1995, there were 11,816 inmates serving sentences for drug crimes out of a
prison population of 51,325. KF
would have preferred to work with data showing the individual duration of
sentence, but these were not available. After
some consideration of different scenarios on sentencing length, KF’s
preferred estimate is Fr 1,315.14M.
In France, the youth protection services cover both minors in danger
and delinquents. Public- and
private-sector aid agencies are funded by the state.
Unfortunately, the Protection judiciaire de la jeunesse does not
publish the number of minors taken into care for drug-related reasons, but the
number of minors charged under the drug laws, about 4%, is available.
Customs employs about 20,000 officers, of whom less than a half are
involved in surveillance and anti-smuggling.
The Customs agency estimates that about 500 agents work full-time on
drug smuggling. KF prorate the
reported total personnel costs of the Customs agency by the percentage on
anti-drug duty. Similarly,
overhead is allocated to anti-drug activities.
The resulting estimate totals Fr 532.29M.
One police service, the national Gendarmerie, exercises control
functions by enforcing the drug laws, and is involved in preventative
measures. Unlike many national
police forces, the Gendarmerie does not have a separate drug unit; KF
therefore have to estimate the costs of police anti-drug activities based on
some relevant measure of output. In
the case of law enforcement, data were available on the proportion of
complaints and of people taken into custody.
KF estimate this police function to cost Fr 311.62M.
Based on an earlier study which found that 3% of patrol functions
involve drug activities, KF arrive at an estimate of Fr 109.5M.
An amount of Fr 38.2M is estimated for other costs, including such
items as anti-drug training programs and dog handlers.
The National Police, a separate entity from the Gendarmerie, has 2,000
full-time officials working on drug problems, plus 195 full-time equivalents,
for a cost of Fr 503.53M. For the
street patrol functions, KF assume that 3% of total time was on drug matters,
borrowing that estimate from their Gendarmerie calculations.
This amounted to Fr 732.43M.
The main estimates of the ministry of social affairs, health and urban
affairs provide some data on drug-related expenses.
Anti-drug programs within the health arm of the ministry amount to Fr
544.3M. This includes funding for
treatment centres, prison programs and community living operations.
There are some technical difficulties in using these reported estimates
because of multi-year contracts. Part
of the official programs to control HIV/AIDS is directed to drug users, for
example needle exchanges. In
addition, voluntary agencies working in this area devote part of their funds
to drug users. After adding in
estimates of these amounts, total spending by the health sector of the
ministry on drug-related activities is estimated at Fr 696.32M.
The social affairs arm of the ministry spends Fr 14M on such activities
as anti-drug training programs. The
interdepartmental affairs program in the ministry’s urban affairs sector
makes grants, often matching, to other levels of government targeted at drug
abuse and HIV/AIDS programs. These
amount to Fr 22M.
In total, the ministry of social affairs, health and urban affairs is
estimated to spend Fr 748.62M on the drug problem.
The education ministry spends Fr 2M on supporting school anti-drug
committees, and Fr 41.68M on research funding at the various higher
educational institutions.
The youth and sport ministry does not break down its spending in
detail. KF estimate that
one person worked half-time on drug issues in each department and region.
This amounts to 52 full-time equivalents at a cost of Fr 8.8M.
The ministry of foreign affairs contributes about Fr 14M, as estimated
by KF, for anti-drug and anti-trafficking programs.
It seems that the ministry did try to produce its own estimates of
spending on this activity, but abandoned the exercise because of technical
difficulties.
The ministry of international co-operation is in charge of aid to
developing countries. Part of
this assistance takes the form of aid to police forces and gendarmeries.
KF make a subjective evaluation that 20% of the policing assistance and
none of the gendarmerie assistance is directed to drug problems and
trafficking, for a total estimate of Fr 42.6M.
Finally, France contributes 17% of the European Union budget in total,
and 17% of the EU drug program spending is Fr 30.87M.
3. Income and Production
Losses
KF prefer to account only for the more measurable costs of drug abuse.
In particular, it does not attempt to measure any subjective pain and
suffering costs. The losses to be
measured include the losses from premature death (including drug deaths and
overdoses), accident victims of drivers who were under the influence of drugs,
and fatalities from drug crimes. Unfortunately,
there are no data for the last two categories.
Also included in the costing are the productivity losses of people
incarcerated and of those hospitalized or off work due to illness.
In 1995, 228 persons died of drug overdoses in France.
The ages of death are not available, and KF use a figure of 35 years of
age. Working from the number of
HIV/AIDS deaths and attributing 25.47% of these deaths to drug use yields 259
males and 60 females. Data are
not available for hepatitis deaths. Assuming
an annual income of Fr 97,012 with a discount rate of 6%, overdoses result in
a cost of Fr 73.62M and HIV/AIDS in a cost of
Fr 131.77M, for a total productivity loss of Fr 205.39M.
Those imprisoned under the drug laws also lose income.
The losses are calculated by assuming the same annual income of Fr
97,012 and multiplying this by the total time of incarceration.
The resulting total is Fr 1,569.34M.
No figures are available for those crimes in which drug use could be
implicated as a causal factor.
Income loss from hospitalizations and sickness caused by drug use is
another category that KF would have liked to have costs for a wide range of
illnesses, but data are not available in France, even for HIV/AIDS.
The value of production lost in the workplace is derived from looking
at the amount of value added from the national income accounts.
Incarcerations under the drug laws result in a productivity loss of Fr
3,677.58M, while early deaths cost the economy Fr 646.88M.
4. Government Revenue
Losses
As well as the essentially private losses that can be attributed to
drug users’ incomes and the incomes of the enterprises that would have
employed drug users had they not been incarcerated, in hospital or on sick
leave, the government loses the various obligatory payments that income
earners, both personal and corporate, are required to pay.
In Canada, these payments are mainly income taxes; but many European
countries separate out social security taxes.
With a sizable government sector taking in 46% of national income,
these amounts are worth measuring, although care must be exercised to ensure
that costs have not already been included elsewhere and double counted.
KF estimate a government revenue loss of Fr 100.25M from premature
drug-related deaths, and Fr 765.99M from incarcerations for drug offences.
5. Spending by Private
Agencies
KF were unable to obtain data on private agencies working in the drug
area. Drug fines are imposed in
France, and should be accounted for as a state receipt.
Individuals may also be sentenced to community service, have their
driving permit suspended, or be required to undertake counselling or
education. Unfortunately, there
are no financial data on these measures.
KF feel it would be perilous to estimate lawyers’ costs.
6. Discussion
The KF study presents some very interesting methodological suggestions
about how to develop cost estimates. It
would seem to the reader who compares this study to the North American work,
that the North American researchers have at their disposal substantially
better raw data as well as more resources to undertake the research and to
sponsor additional research to fill in knowledge gaps.
It is quite surprising to see which data are not available in France.
For example, premature deaths from drug overdoses were not available
broken down by gender. In terms
of the way in which KF compute estimates, this was not an issue: KF assume
that everybody is capable of earning the same income – the national average
income – be they male or female, inexperienced or established in the labour
force.
KF are interested in a systematic decomposition of costs that North
American researchers did not use. But
it is less clear whether this decomposition gives new insights or answers
relevant questions in a substantially different way.
Emphasizing the loss to society of forgone taxes and social security
levies resulting from early death or imprisonment or sickness is valid, but
numbers based on a national average wage will be rejected by those who point
out that many inmates have a history of minimum-wage employment.
Some questions and complications introduced by KF seem to be of no
great practical importance. For
example, the costs of imprisonment can be calculated either on the basis of
what costs were incurred in the base year or on the basis of those who were
sentenced in the base year.
In the area of public administration costs or indirect cost of drug
control, the methodology used by KF is very much the same as that used in the
North American studies, namely, cost allocation.
The total costs of policing, courts and prison are divided by some
indicator of the fraction of system use that can be attributed to drug
offences.
E. Critiques and
Rejoinders
In 1999, the Society for the Study of Addiction to Alcohol and Other
Drugs devoted 17 pages of its journal Addiction
to a discussion of the 1998 HFL study.([5])
After an exposition of the report, four experts commented on the
study.
1. Peter Reuter
- Are Calculations of the Economic Costs of Drug
Abuse Either Possible or Useful?
In summary, Reuter sees a number of flaws in cost estimation studies:
I
believe that even for the data-rich United States, the results are subject to
enormous uncertainty; plausible changes in a few key assumptions can lead to
major changes in both total costs and its composition in two sets of relevant
dimensions (source and incidence of burden).
This is a consequence of both conceptual ambiguities and empirical
limitations that are unlikely to be resolved in the foreseeable future.
Moreover, the value of the exercise is in question; the policy
objectives ostensibly served by these estimates would be better met by
research estimating impacts of policy changes.
Reuter
in Harwood, Reuter et
al., p. 636
These
types of studies attempt to cover the whole of society, but scientific
understanding and knowledge may not have progressed far enough to be useable
in some areas. Reuter finds that
there is not a strong empirical base for many of the figures that make up the
estimates. As an example of an
area of inconsistent findings by previous researchers, Reuter looks at the
cost of impaired productivity. This
is a major cost of substance abuse. Some
previous analyses with other datasets found no statistically reliable,
significant impact of drug use on wage rates, earnings or employment.
The statistical results on marijuana use are quite diverse, with some
studies finding that marijuana users are more likely to be employed than
non-users.
HFL decided to undertake their own investigation of the effects of drug
use on current income. Reuter
finds the new research results reported by HFL
ambiguous; the estimates changed considerably with alterations in the
model specification. He sees no
statistical reason to ignore the previous research on this topic and just use
one of the new results.
In other parts of the HFL study, estimates are based on no more than a
good guess. Reuter cites
homicides as an example of this. The
study attributes 15.8% of murders to drug abuse based on U.S. Federal Bureau
of Investigation records, and presumably people in the police system have made
guesses about the role substance abuse played in specific cases.
Reuter cites earlier research that reviewed FBI records and interviewed
homicide detectives and found much uncertainty in the attribution of causal
factors. Reuter argues that the
substantial literature on drugs and crime shows little sign of making major
progress in this area. The HFL
study uses point estimates which may be subject to large sources of
non-statistical error.
In those areas with a weak research base, HFL set the cost at zero.
For example, the study attributes no vehicle accidents or fatalities to
drug abuse, because of a lack of reliable data.
Reuter points out, however, that a number of other studies mention
cases where authorities have tested reckless drivers who were not drunk and
found drug abuse. The measured
fraction of drug abusers differs among the various studies of illicit drug
abuse and driving accidents, but it is never zero.
HFL attempt to estimate the value of resources that would be freed up
if no illicit drugs were consumed. However,
the elimination of drug consumption raises different conceptual problems from
the elimination of, for instance, diabetes.
If someone is cured of diabetes, that person will not be predisposed to
contract another disease; but if, for example, smoking marijuana were
eliminated, would drinking increase in response?
Reuter is somewhat sceptical of the usefulness of economic cost
studies. Would they contribute to
a better understanding of the nature and magnitude of the impact of alcohol
and drug abuse? Would they help
decision makers to identify appropriate strategies?
Reuter tests these questions by looking at the use made of earlier cost
studies. Reviewing a sample of
publications that cite the cost studies, he finds that data on the high cost
of substance abuse are used only as a prop for a policy argument.
That use would not have been altered were the cost have been much
higher or lower. Costing policy
changes needs estimates of marginal rather than average costs.
Reuter credits the official U.S. interest in these calculations to
interagency competition for funding and resources in an era that takes numbers
seriously. Reuter sees the
process of generating such estimates as the statistical equivalent of an
armaments race: each agency needs a number to show the seriousness of the
problem for which it is responsible.
2. Mark A.R.
Kleiman – “Economic Cost” Measurements, Damage Minimization
and Drug Abuse Control Policy
Kleiman argues that, although exercises to calculate the economic costs
of alcohol and drug abuse ought to be an important first step in designing
policies to minimize harm, the use of a concept of cost that is too narrow in
scope and not a marginal cost limits the usefulness of these estimates.
Kleiman is strongly convinced that the willingness-to-pay approach to
economic cost is a far superior measure.
In the willingness-to-pay method, economists find out the dollar amount
that consumers would be willing to give up from their own resources to avoid
the disadvantages created by the condition to be costed.
This is a much wider meaning of economic cost than the opportunity cost
notion, which concentrates on the cost of lost resources that are readily
convertible into dollars and cents. For
example, the narrow opportunity cost of an injury would be medical expenses
plus lost wages, excluding any measure of pain and suffering.
The opportunity cost underestimates the willingness-to-pay measure.
To Kleiman, the willingness-to-pay measure alone allows a coherent and
consistent analysis. Would
society be better off if a treatment for a painful injury or disease was
developed? If the disease did not
account for much absenteeism, development costs could outweigh the gain in
productivity and this treatment would show up as a net loss to society.
But if the reduction of pain and suffering was estimated, the benefits
of this treatment could outweigh the costs.
HFL use the narrow definition of economic cost because of data
limitations. Measuring
willingness-to-pay to avoid small risks of death results in much higher
estimates of the costs of an early death than the discounted present value of
future earnings, typically in the order of
millions as compared to hundreds of thousands of dollars.
According to Kleiman, HFL’s bad choice of cost measure makes the
published results counter-intuitive in a number of places.
The study finds that car crashes caused by substance abuse produce more
damage to automobiles than to humans. Alcohol
kills four times as many people as illicit drugs, but is estimated to cause
only 50% more total damage.
Kleiman suggests the following back-of-the-envelope calculation to see
the order of magnitude change that would result from using a more appropriate
measure of loss. If the one tenth
of the adult population of the United States that suffers from substance abuse
would be willing to pay $10,000 for a year’s remission, then the total
willingness-to-pay to avoid addiction itself would total $200 billion per year
in the United States. This is
nearly as much as the HFL estimate of $246 billion for out-of-pocket expenses,
direct costs and lost income from addiction.
Kleiman puts forward the figure of $10,000 from introspection and
quizzing acquaintances. He argues
that it would seem a plausible number for the average American.
The HFL estimate of the financial impacts of substance abuse covers
only a part – very likely, in the light of this back-of-the-envelope
exercise, less than half – of the properly measured cost.
This could lead to an underestimate of the benefits of policy
intervention and perhaps the choice of wrong policies.
Rather than the total cost of substance abuse, the real policy interest
is the marginal impact on costs of changing policy variables.
Policy questions do not ask “What is the total cost of cocaine
abuse?” but, more likely, “What would happen to the total economic costs
of cocaine abuse if another 100,000 dealers were imprisoned, or another
100,000 addicts treated?” A
different approach to model building is needed.
The results from HFL cannot be easily fixed up to give marginal
impacts.
Knowing the economic cost of illicit drugs, whether on a
willingness-to-pay basis or not, does not illuminate important questions such
as whether it is better to imprison an additional dealer or treat an extra
addict, or whether either would be a good social investment.
This requires a detailed modelling of the demand and supply sides of
the illicit drug markets.
3. Pierre Kopp
- Economic Costs Calculations and Drug
Policy Evaluation
Kopp finds the methodology of calculating public spending on illicit
drugs questionable and the breakdown of the social cost unpersuasive.
He finally questions whether social cost estimates help guide public
policy.
The cost figures for the public sector include total spending by drug
agencies plus a fraction of the budgets of the multi-function agencies, such
as police, which deal with a wider range of social problems than substance
abuse. Kopp argues there is an
incentive for U.S. agencies to label too much as drug-related to take
advantage of the relatively more plentiful federal anti-drug funding.
Kopp also finds the rule-of-thumb approaches that the multi-function
agencies use to allocate costs are inconsistent.
As an example, Kopp considers AIDS and injection drug use.
One-third of AIDS cases are drug-related but Kopp is against allocating
one-third of the U.S. AIDS bill to the drug bill.
It is part of the government war on AIDS and not part of the war on
drugs, because it treats AIDS, not drugs.
This does not affect the total amount of public spending, but its
distribution. Kopp finds the
methods used in costing the drug prevention area inconsistent with the AIDS
costs. Drug prevention spending
seems too low to Kopp, who is of the opinion that many non-federal healthy
lifestyle or anti-delinquency programs were not included.
The law enforcement and criminal justice costs are so much out of line
with previous estimates that Kopp thinks there must be some accounting or
reporting problem requiring more discussion.
The calculation methods used by the law enforcement agencies are often
unclear. In addition, the
methodology is inconsistent with that used in the case of AIDS, because a
portion of non-drug crimes in which drugs was a factor is not costed.
The division of the social costs of drug use between the various
parties produces results that Kopp finds surprising.
HFL reported that nearly one half of social losses accrue to the
government. Kopp argues that
premature death should result only in a loss of future tax revenue, and that
the abuser should be allocated the cost of future lost income.
Also, early death lessens future government expenses and transfer
payments. Kopp is uncomfortable
with a lack of distinction between the government and the taxpayer, who is the
ultimate source of funds for the government.
He would have preferred an attempt to allocate costs to abusers, crime
victims, non-abusers, private insurance and the government.
Kopp thinks that employers pay part of the costs of lower productivity
caused by drug abuse, as well as increased health insurance and social
insurance premiums. Similarly,
the family members of the drug abuser face a reduced family standard of living
because of the abuser’s lower income, coupled with higher health care and
insurance costs, plus a reduced quality of life for the family.
For Kopp, current methods of calculating the social cost of drug use do
not lead to ways of modelling large changes in drug policy.
Lowering consumption by putting abusers at higher risk of criminal
prosecution might eventually cause total social costs to rise because of the
effect of criminalizing drug users, but the methods in the study do not
illuminate these sorts of questions.
4. Mark A.
Cohen – Alcohol, Drugs and Crime: Is “Crime” Really One-Third
of the Problem?
Cohen finds four issues of concern in the HFL study, centring on the
inappropriate attribution of some crimes to alcohol or drug abuse and the use
of inaccurate data on the cost of crime.
Unlike the case of medical problems, where epidemiological studies
isolate the relative risk and control for other health risks, the data linking
crime with drug abuse are mainly based on interviews with detainees and
prisoners. Such data are subject
to over-reporting, because prisoners use alcohol and drugs as an excuse and
intoxicated criminals are easier to find and arrest.
Cohen does not find the figures in the study credible.
Thirty percent of homicides are attributed to alcohol abuse, and
another 15.8% to drug abuse. To
Cohen it is implausible to argue that doing away with drink and drugs would
halve the U.S. murder rate.
The theoretical and empirical research does not support this degree of
causal effect. Developmental
histories show that criminal activity comes before substance abuse.
The statistical research can neither rule out nor rule in causality.
Some drugs inhibit violence, but others induce violent behaviour.
The HFL report understates the number of crimes, because it uses the
number of crimes reported to police. Not
all crimes are reported to the police. There are social surveys that ask a
random sample of the population if they have been a victim of a crime
recently; the degree of under-reporting can be quite staggering, with 5
million assaults reported to the police out of 7 million, and only 140,900 of
1.1 million rapes reported.
According to Cohen, HFL use outdated estimates of the cost of crime,
which seem to underestimate the true costs.
The research in this area has moved towards more substantial cost
figures. For example, the
estimated average medical cost for a rape victim rises from $28 to $2,200 when
long-term care and counselling are added in.
Similar problems are found in the lost productivity estimates for crime
victims, where the short-term figures used by HFL are only about a quarter of
the newer long-term estimates.
In the same spirit as Mark Kleiman, Cohen thinks that opportunity costs
such as medical costs plus lost wages are too narrow a basis on which to
measure the true costs of being a crime victim.
The intangible losses from crime, pain and suffering, which manifest
themselves in such things as not being able to enjoy a walk in the park from
fear, or worrying about being victimized again, are very real to the victims.
They change observable behaviour, and are now starting to be measured.
Cohen disputes the assumption in the HFL report that if offenders were
not in prison they would be earning average wages.
This assumption is used to generate an estimate of lost earnings from
incarceration. In earlier
research, Cohen had found much lower earning potential for inmates – in
fact, far below a full-time minimum wage job.
Of course, part of the low earning potential can be attributed to
substance abuse, but substance abuse is symptomatic of other psychological
problems. Some other researchers
have also found that street drug dealers had below-average earning records
before taking to crime.
5. Eric Single and Brian
Easton – Estimating the Economic Costs of Alcohol Misuse:
Why We Should Do It Even Though We Shouldn’t Pay Too Much Attention
to the
Bottom-line Results
At a meeting in Toronto in May 2001, Eric Single and Brian Easton
presented a vigorous defence of economic cost studies.([6])
It should be noted they were not part of the symposium summarized above
and are not explicitly replying to the above critiques.
As might be expected from the title of their paper, many shortcomings
in the CCSA study are admitted; but it is argued that the real value of such
studies lies in the detailed results on mortality and morbidity, and on the
relative contribution of acute and chronic conditions to overall problem
levels and adverse social consequences such as crime and economic
productivity, rather than in using the bottom-line results to promote abuse
issues to a higher place on the public policy agenda.
Stakeholders, policy makers and the media are very interested in the
costs of substance abuse. Single
and Easton believe that these economic cost studies inform decisions about
funding and interventions to prevent or reduce adverse consequences.
Single and Easton see themselves as producing an index like the
mortality rate or GDP. They ask
themselves: “For all their failings, what serious demographer would abandon
mortality rates, what serious economist would throw out GDP?”
The cost estimates provide a framework for comparing the aggregate
societal impact of addictive substances. There are practical limitations at
the present state of development of cost estimates, stemming from data
inadequacies and from difficulties in applying new theories.
However, these limitations should be identified and remedied.
Single and Easton enumerate the main sources of error in economic cost
estimates. The costs of premature
mortality have usually been estimated by the human capital approach based on
estimates of forgone future, but the willingness-to-pay technique has now been
used in some studies of tobacco costs. Single
and Easton support the philosophical position that we value life above the
value of lost of production, but point out this is a new area of measurement
without full consensus among the experts.
There is a lack of basic data on many items of interest.
The proportion of crime attributable to substance abuse is highly
contentious. Consumption data are
a problem for both illicit and legal substances.
Productivity problems such as absenteeism, job turnover, lower
on-the-job productivity and disability, and their relationship to substance
abuse, are not well measured. Government
budgets do not break out drug policy costs for prevention, research and law
enforcement.
The prevailing methods for estimating economic costs involve a layering
of multiple assumptions. The
estimates of death and illness attributable to substance abuse are based on
the relative risk that abusers will contract an illness, and prevalence or
consumption data. These two
figures are combined to give the etiologic fractions, which are then applied
to the reported number of deaths and illnesses to give the attributable
numbers. The relative risk
figures come from epidemiological analysis and may involve the meta-analysis
of data from different countries. This
can introduce inaccuracies. For
example, epidemiological studies from Canada and Australia are often combined
because they are medically similar countries; but freezing to death, which
accounts for 20% of overall mortality in certain parts of Canada and is often
the result of alcohol misuse, is almost unknown in Australia.
Although they agree there are still significant sources of error in the
bottom-line estimates of total economic costs, Single and Easton remain
committed to these studies. Undertaking
a study identifies information gaps,
research needs and desirable refinements to national statistical reporting
systems. The CCSA found a gap in
the information available on the proportion of crime that could be attributed
to alcohol and drug misuse in Canada. As
a result of that finding, a study was being undertaken by Kai Pernanen and
Serge Brochu on this topic in 2001. Moreover,
the economic cost studies set standards of quality control for those
policy makers who need and use cost estimates.
Unlike Reuter, Single and Easton feel that economic
cost estimates are frequently used to argue about policy and funding
priorities. Cost estimates help
to direct attention to those areas of substance abuse that involve the
greatest economic costs. Single
and Easton forecast that the development
of improved estimates of the costs of substance abuse offers baselines
measures for more sophisticated economic analyses to determine which policies
and programs are the most effective in reducing the harm associated with
substance abuse.
F. Discussion
Of the four authors who reviewed the U.S. cost study, two are opposed
to further such studies being undertaken, while one wishes more such work were
done in Europe. In addition to
the large questions of whether economic cost studies are worthwhile in
themselves or whether they are the best research strategy for investigating
addiction and providing policy advice, a number of questions of a more
technical nature were raised.
The CCSA study found that lowered productivity is the major cost
element, accounting for 60% of all costs related to drug abuse in Canada in
1992. However, the effect of
substance abuse on workplace performance is the subject of considerable debate
between experts. Comparisons
between the wages of impaired workers and those of the unimpaired would tend
to show that impairment has a cost; but if the analysis is done rather
differently to model the joint choice of job and of drug use, these results
can be reversed. The professional
debate is rather subtle, concerning issues of selection bias.
A less esoteric question about how the drug problem works may
illustrate the issue. If the drug
user in a job below his qualifications and training stops – or is stopped
from – using drugs, will he move on to a higher-paying job?
The answer will depend on whether drug use is like a disease or more
like a choice of lifestyle. It is
difficult to analyze data in a way that sheds light on this sort of question.
A related concern can be raised about the CCSA study’s use of average
earnings to value future loss of life, and the basis for thinking that if
addiction is removed the individual lifetime income will improve.
A willingness-to-pay approach, or the inclusion of some pain and
suffering costs, seems to be gathering more support among analysts and will in
all probability become the new standard in cost studies in the not-too-distant
future.
The treatment of crime in the CCSA study is far from satisfactory.
Canada has a low rate of crime against the person, unlike the United
States; but it has a high rate of property crime.
Moreover, a substantial percentage of crime is not reported to the
police. Some of the American
concerns may not be relevant to Canada. Altogether,
it is a very open question how far the experts are from reaching any consensus
on the role of drugs in crime.
The CCSA study includes only the administrative costs of transfer
payments such as welfare, not the amount of the payment itself.
The study treats health insurance benefits (treatments,
hospitalization, prescription drugs and so on) as items to be costed, but not
social or employment insurance benefits.
The amount attributable to activities concerning illicit drugs was too
small to include. It should be
pointed out that some provincial governments have had campaigns against drug
users on welfare. This may be an
area where expert opinion and public views differ significantly.
Another criticism concerns the study’s treatment of medical costs
related to deaths from drug abuse. The
study considers the entire amount of such costs to be drug-related.
However, everybody will die of something eventually.
It could be argued that the appropriate cost element, in the case of
deaths from drug abuse, is the excess of those costs over average medical
costs at the end of life.
Of course, the CCSA study has cut corners and made approximations, but
the ultimate standard by which it will be judged is how much use it is to the
client population. That
usefulness is still an open question: how well the study answers questions
depends on what questions are asked. Reuter
finds no citation evidence that U.S. cost studies have been used for anything
more than a prop for an argument. Single
and Easton argue the contrary but present no evidence.
Single and Easton feel that economic cost studies will provide the
basis for more sophisticated policy analysis, while Reuter argues that one
might as well go directly to policy modelling.
The technical points here are that in policy analysis marginal impacts
are needed, which require a detailed systems modelling of various connections.
Neither of these is a part of a standard economic cost study.
How different policy modelling can be is illustrated in the next
section, where a famous RAND policy modelling is discussed. COST-EFFECTIVENESS
STUDIES
Cost-effectiveness studies focus on a well-defined empirical target,
and the question for the policy analyst is how that target can be achieved at
the lowest cost. The target
itself may not be a true policy objective, such as diminishing the harm caused
by drug abuse; instead, it may be something less encompassing or a more
intermediate target, such as achieving a specific reduction in aggregate drug
consumption. The most
cost-effective policy need not be worthwhile in the sense that the benefits of
this policy should exceed the costs; it may simply be the way to achieve a
pre-determined goal at minimum cost.
A. Controlling Cocaine:
Supply versus Demand Programs
Controlling Cocaine: Supply vs. Demand Programs (the RAND study)
by C. Peter Rydell and Susan Everingham, caused quite a stir in U.S. policy
circles when it was first published in 1994.([7])
It compared domestic drug treatment programs with supply control
methods such as eradication of drugs in the source countries, interdiction,
and domestic law enforcement. U.S.
military resources had been mobilized in the U.S. drug war, perhaps looking
for a new role at the end of the Cold War, and there was considerable debate
in the country about whether this was a suitable use of the military.
Domestic law enforcement efforts were being toughened.
Prison sentences were being lengthened, along with mandatory minimum
and “three strikes” policies. The
RAND study concluded that there was compelling evidence that drug treatment is
the most cost-effective method to reduce cocaine consumption.
The study was used to suggest that funds ought to be redirected away
from the military towards drug treatment programs.
The expected reaction ensued. The
Institute for Defence Analysis was asked to produce a study of the U.S.
interdiction effort abroad; it found that interdiction really worked.
Faced with these conflicting results, the Office of National Drug
Control Policy asked the National Research Council to evaluate the two
studies.
In 1994, the authors found that the U.S. cocaine epidemic was not over
but that the peak aggregate consumption had passed.
Looked at more closely, consumption patterns were still a cause for
concern. The overall decline in
the number of cocaine users was the result of a substantial decline in the
number of light users, defined as people who consume cocaine at least once a
year but less than weekly, coupled with a substantial increase in the number
of heavy users. The heavy or
weekly user consumes about eight times as much cocaine as the light user.
The preceding 15 years had seen the price of cocaine decrease while
consumption increased in spite of increasingly stronger public policy
responses.
According to RAND figures, in 1992 the U.S. spent about $13 billion on
cocaine control. Domestic
enforcement – such as seizing cocaine, making arrests, and imprisoning drug
dealers – was estimated to cost $9.5 billion.
Interdiction by the Coast Guard, Army and Customs Service cost $1.7
billion, while outpatient and residential user treatment programs cost $0.9 billion.
Supply strategies to control cocaine included operations in the source
countries, interdiction before and at the U.S. border, and the domestic
enforcement of drug laws. The
main demand strategies included drug treatment programs, sanctions to reduce
demand such as the fear of arrest and prison, and prevention programs in
schools and communities.
For cocaine, the demand and supply strategies work through the
marketplace, which equilibrates demand and supply.
The authors are interested in a long-run equilibrium.
·
Demand
controls
can reduce the number of users or the amount that they are willing to purchase
at a given price. Prevention
programs attempt to reduce future demand by persuading people not to becoming
users. Treatment programs work in
two ways to reduce consumption: first, people in treatment are off drugs; and
second, after treatment, a number of them will be able to control their usage.
Sanctions make users fearful of the consequences of consumption.
·
Supply
control
strategies remove cocaine from the production and distribution system.
They do not make it impossible to obtain cocaine in the United States,
but they increase its price. The
producers and dealers have to raise the price on the cocaine that gets through
to cover the costs of both the supply actually sold and the supply forfeited
to the authorities. Increased
drug seizures mean increased arrests and imprisonment, and the forfeiture of
assets. Drug dealers will seek
additional compensation for the increased chances of being arrested and
imprisoned as well as for the loss of assets.
These costs, along with additional recruitment costs, will be passed on
to the user. Supply control
policies work in the same way as spoilage, wastage, theft and shoplifting do
for normal goods, with additional costs being embedded in the retail price.
The RAND study set a target of a 1% decrease in cocaine consumption
over a 15-year period, and asked whether it would be cheaper to meet this goal
by means of demand control or supply control.
To find the answer, the authors have to specify the demand function for
cocaine in the United States and determine how this function is changed by
spending more on drug treatment programs.
They also have to specify the supply function for cocaine in the United
States and determine how this function is changed by spending more on
interdiction and law enforcement. These
are not easy tasks. The RAND
Corporation has been undertaking a substantial research program in this area
for many years, and the authors benefit by being able to draw on parameters
and insights from preceding RAND studies.
1. Supply
The RAND Corporation has modelled the supply process for cocaine as a
series of production steps: ·
coca
is grown and the leaf harvested; ·
the
leaf becomes a paste; ·
the
paste becomes cocaine base; ·
this
cocaine base is then shipped to the United States; and ·
the
cocaine is then parcelled out and sold on the street.
Cocaine is a refined agricultural product, easy to grow and requiring a
fairly simple refining process. Changing
supply should not alter costs. In
1992, cocaine cost only $4,000 per kg in South America, but one kg had a U.S.
retail value well over $100,000. This
mark-up reflects the U.S. domestic interdiction and law enforcement efforts in
place in 1992. These numbers
suggest that replacing seized product is not the largest cost faced by the
illicit drug industry. The three
supply control programs considered by the authors are source countries
control, interdiction, and domestic enforcement.
They ran their model for each of these three alternatives.
The RAND Corporation modelled each of the six stages in the cocaine
production process mentioned above. The
output at the previous stage becomes the input at the current stage.
Input and output at each stage of production are related by a yield
factor. Net output at each stage
equals gross output, minus seizures, minus consumption, where consumption
denotes that product which is diverted away from the stream headed for the
United States. The total cost of
production at each stage is equal to the costs of the drug from the previous
stage of production, plus processing costs at that stage, plus the cost of the
financial sanctions imposed by seizures and arrests.
From the assumption that the cocaine market is competitive, price
equals average cost of product sold. This
gives a downward-sloping long-run industry supply curve, which is the long-run
average cost curve.
The effect of supply control programs is to move the supply curve
around; in simple terms, it makes less product available at higher prices.
Costs are imposed upon the drug producers from losing production and
distribution workers; producers seeking financial compensation for these
additional costs move the supply curve around.
To increase these financial sanctions against drug dealers, the public
has to spend more on its various enforcement authorities.
The cost of cocaine is assumed to increase with the level of supply
control activity. The public cost
of supply control programs consists of the seizure costs, the costs of
processing arrests, and the costs of imprisoning those found guilty.
Subtracted from this is the value to the public of the assets seized by
the police from the drug dealers. The
authors model the relationship between the total public expenditure on supply
control programs mathematically as a power function of the quantity of cocaine
seized. The power chosen is
greater than one in value. This
means that the public cost increases disproportionately as more and more
cocaine is seized. The authors
have a parameter that they call the diminishing productivity parameter – the
ratio of marginal productivity of supply control expenditure to average
productivity. The seizure costs
themselves depend upon the proportion of cocaine seized when searches are
random; however, when searches are based on intelligence information, the
costs depend on the amount seized.
2.
Demand
In 1992, there were approximately 5.6 million light users of cocaine
and 1.7 million heavy users in the United States.
Within the technical literature on addiction, researchers specify a
multi-stage process of abstinence, initial use, abuse, dependence, and finally
recovery. RAND has undertaken
longitudinal studies of cocaine use progression.
The researchers estimate that every year 15% of light users stop using
cocaine, and 2.4% move up to heavy use. The
annual outflow from heavy use is 6%, made up of 4% returning to light use and
2% abstaining. Against this
pattern, the authors considered increasing the availability of outpatient and
residential drug treatment programs. The
outpatient treatments are shorter, less costly, and have been used more.
Residential treatments are relatively expensive, take longer and are
less used.
About 80% of users do in fact keep off cocaine during the treatment
program; and some users will drop out before completion.
The success rate of these treatment programs is quite low.
In the year after treatment, 12.2% of those who received outpatient
treatment were no longer heavy users, compared to 16.7% in residential
treatment. The authors estimate
that these programs account for a 4% outflow from heavy users.
Thus two-thirds of the annual outflow from heavy users of cocaine can
be attributed to drug treatment programs, with one-third of those heavy users
who escaped from heavy use doing it on their own.
The average treatment cost was $1,740 in 1992.
This rather low figure reflects the high use of outpatient treatment as
opposed to the more costly residential treatment programs.
The authors point out that a surprisingly large part of the reduction
in cocaine use by heavy users is during the treatment program.
One-fifth occurs during treatment.
Treatment programs in the United States attract only heavy users; thus,
demand control programs will affect
only one part of the user population. On
the other hand, supply control programs work through the price mechanism, and
all users will reduce their consumption to a certain extent, as determined by
their price elasticity.
The modelling of demand is complicated by the need to introduce some
supply control considerations, because enforcement efforts will change the
number of dealers, who are also drug users.
The authors model the number of users according to a Markov model, in
which an individual changes from one state to another, such as from being a
light to a heavy user, with a known probability.
The number of light users in the current year is equal to the number of
light users in the previous year, plus the number of new light users, minus
the number of light users who quit, minus the number of light users who become
heavy users, plus the number of heavy users who become light users.
Similarly, the number of heavy users depends upon the previous year’s
number of heavy users, plus the number of light users who have increased their
consumption to heavy, minus the number of heavy users who have quit totally or
become light users. Price changes
affect the probability that an individual will change usage category.
This is modelled as a power function.
Total cocaine consumption is given by the number of light users times
their average consumption rate plus the number of heavy users times their
average consumption rate. The
consumption rate of light users depends upon the current price of cocaine, and
the incapacitation rate of drug dealers who were light users relative to the
base period. For heavy users, the
consumption rate depends upon three factors: price; the incapacitation rate of
the dealers who were heavy users; and the desistance rate, which is related to
the average amount of time that the average heavy user in a treatment program
remains drug-free.
The authors assume that outpatient treatments for drug offenders will
be offered to those users who are easy to treat, while the more difficult
cases will be treated as inpatients. This
implies that increasing the budget for drug treatment will mean catering more
and more to those clients who need residential treatment.
There will be increasing costs for individual treatment as the
treatment budget increases.
The RAND model is solved over a 15-year period from 1993 to 2007, with
demand being equated to supply in each period.
Because cuts in consumption occur at different times during the model
runs under demand versus supply policies, the study compares the current value
of cuts in cocaine consumption and increases in program costs in 1992 present
values.
The authors have gathered data and estimates from a number of earlier
RAND studies, including data on: ·
coca
production in Bolivia, Colombia and Peru; ·
the
amount of leaf produced; ·
the
base refined from the leaf; ·
final
cocaine; ·
the
corresponding price data at each stage of production; ·
the
amount that has been seized by the authorities; ·
the
cost of seizures to the public purse (source: various law enforcement
authorities). In the United
States, the assets of drug dealers may be forfeited to the police.
The value of these assets is calculated both on the basis of the cost
of replacement for the drug dealers, as well as on the value realized upon
public auction. The replacement
cost of the assets is part of the financial sanctions faced by the dealers.
The auction value becomes part of the budget of the police force.
At various times, the RAND Corporation has analyzed budgets of the
police authorities, the court system and the prisons.
From these budgets they have derived estimates of the amount of public
resources devoted to law enforcement activities against cocaine drug dealers.
In most cases, direct data have not been available, so that the amount
of public resources devoted to dealing with cocaine offences has been assumed
to be proportional to the percentage of cocaine arrests.
In addition to the public costs of law enforcement, early RAND studies
had formulated estimates of the cost to drug dealers of being arrested, tried,
and spending time in jail. To
give an idea of the magnitude of these numbers, the cost to a drug dealer of
being arrested was put at $6,395,
based on a 1986 study adjusted to 1992 values.
A cell-year in prison was estimated in 1992 to impose a cost of $38,588
on producers and drug dealers. It
was assumed that these costs were one-third of the U.S. level in foreign
source countries.
B. The National Research
Council Analysis of the RAND Study
The U.S. National Research Council sees the downward-sloping supply
curve in the RAND study as worthy of debate.
According to the Council’s understanding of the RAND study, marginal
costs do not change with output in the growing and refining stages of cocaine
production, but spreading the burden of drug seizures over an increasing
output results in lower average costs at the retail level.
The Council is interested in seeing if the authors’ results are
invariant under different parameters of demand and supply.
The Council notes that the authors do not consider the possibility that
some policies may affect both demand and supply.
For example, increasing domestic enforcement may deter purchasers.
Although the National Research Council finds the RAND study to be
serious, innovative and sophisticated compared to previous studies of drug
policy, it believes that the study makes many unsubstantiated assumptions.
Plausible changes to these assumptions may change the qualitative
conclusions of the study. Thus,
the Council does not find the conclusion that demand control policies are
superior to supply control policies to be persuasive.
The measures of treatment effectiveness in the RAND study are derived
from the TOPS, or Treatment Outcome Prospective Study, that looked at more
than 11,000 patients in 41 treatment programs in ten cities between 1979 and
1981. Some follow-up continued
for three to five years. However,
according to the Council, TOPS looked mainly at methadone replacement for
heroin. (There is no replacement
drug for cocaine that is as useful as methadone is for heroin.) Could the
results be biased because of more highly motivated subjects in the 41
treatment programs? Would their motivation have yielded similar results
without the program? Moving more resources into drug treatment programs, as
the RAND study recommends, may involve treating groups of drug users who are
less susceptible to treatment programs. The
National Research Council believes that: the RAND study has ignored the
difficulties of inferring treatment effects in heterogeneous populations; and
the sensitivity analysis performed by the authors is not wide enough to cover
these difficulties. The
National Research Council also questions: ·
the
assumption of the downward-sloping supply curve; ·
the
way control activities affect production costs; ·
the
use of seizures as a measure for control activities; and ·
the
assumption that the cocaine market equilibrates by price alone.
The Council presents an approximation to the authors’ model in which
supply curves slowly upwards. With
these new parameters, consumption becomes more responsive to supply control
measures.
The RAND study assumes that one dollar added to average costs at any
stage in the production results in the same addition to retail price.
The National Research Council questions this, wondering why a cost
increase at the coca growing stage is not marked up by the same amount as the
base product. The implication of
this is that foreign zone operations could be much more effective than the
RAND study calculates.
The Council argues that, in illegal markets, consumers as well as
dealers face legal sanctions and social stigma.
Police crackdowns may substantially increase the search costs to find
cocaine, making the shopping process more expensive.
The Rand study does not consider these matters.
On the demand side, the Council has questions about the value chosen
for the price elasticity parameter, or how responsive demand is to price (an
elasticity of -1 means a 1% increase in price causes a 1% decrease in the
quantity demanded) and the way RAND models the impact of control policies
through the demand side.
As in all demand and supply analysis, the elasticities are crucial, and
making the demand for cocaine more elastic dramatically improves the
effectiveness of supply control programs.
Given the measurement difficulties, there were few studies of the
demand for illegal substances available to the authors.
However, much more analysis had been done of the demand for legal
addictive substances such as alcohol and tobacco.
The RAND study used a price elasticity of -0.5, which was borrowed from
the alcohol studies, and performed sensitivity analyses on the values of -0.38
and -0.75. Econometric studies
published since 1994 suggest that the price elasticity for cocaine is much
higher than had previously been thought, perhaps even over -1.0.
In the RAND study, everyone shares the same price elasticity, be they
light or heavy users. In
practice, however, the price may affect initiation very differently than it
affects intensification of drug use. The
RAND study deals only with cocaine and does not consider other psychoactive
substances, either illegal or legal. It
is often argued, however, that there is a high degree of relatedness in demand
between the various drugs that satisfy the same underlying psychological
needs.
The RAND model faced considerable criticism from the Council on
methodological grounds. Words
such as “unsubstantiated” and “unpersuasive” are strong criticisms of
any research that is meant to advance policy.
The RAND model in total or in its elements has not been subject to a
systematic validation by its authors. There
has been no “goodness of fit” testing of the model, nor any attempt to
evaluate the accuracy of the model’s predictive capabilities based on the
sample actually used.
C. The RAND Response
In 2000, RAND issued a response to the National Research Council’s
assessment.([8])
The RAND study based its estimates of the effect of drug treatment
programs on the TOPS data, but the RAND researchers feel that it successfully
separated the cocaine users out of the dataset and excluded heroin users and
those on methadone replacement. Large-scale
studies such as TOPS face problems of selection bias, but the authors
discussed these matters with treatment experts at the time and estimated
effects conservatively. They put
two-thirds of those who self- reported as abstainers into the light use
category. The RAND researchers
remark that since the study was initially published, they have been told as
often as not that the estimates of treatment effects were too small.
At the time of the original study, some sensitivity analysis was
performed on the treatment effects parameters but, perhaps mistakenly, the
results were not published because the conclusions were not sensitive to the
numerical experiments then performed. RAND
argues that its study shows that even with post-treatment success rates as low
as 13%, drug treatment programs are more cost-effective than the law
enforcement controls. RAND thinks
that it is important to obtain better estimates of the effectiveness of drug
treatment programs for policy analysis, but it is most likely that new
estimates will only support the existing conclusion.
The National Research Council also wondered what would happen if the
supply curves were of a different shape.
The RAND supply curve was derived from the argument that long-run
prices equal average cost and that average cost includes the cost of cocaine
seized, and that the risk of drug dealers being caught, fined, imprisoned and
having assets seized was priced into the supply curve.
The Council asked what would happen if drug dealers required more
compensation than that. In the
RAND response, economic rents were added, but the effect was to reduce the
ratio of domestic enforcement to treatment costs from 7.3 to 7.2 times.
Changing the convexity of the cost curve, or how fast cost changes with
scale of output, had some effects, but not enough to reverse the conclusions.
The authors had argued that, in the long run, coca would be grown and
refined at constant marginal cost because there were no constraints on new
resources being brought into use. Coca
is easy to grow and the refining processes are straightforward.
RAND ran the model with a convex cost curve, but domestic enforcement
was still 3.8 times as costly as drug treatment programs.
The authors believed that one of the factors leading to a
downward-sloping, longer supply curve was the effects of enforcement.
A bigger market spreads the enforcement resources more widely and
reduces their effect on unit price, while a small market makes the effect of
enforcement on cost higher. RAND
looked at the model again, making the cost of seizing a fixed proportion of
the cocaine market independent of market size, and found that domestic
enforcement was 6.5 times as costly as drug treatment programs compared to the
original 7.3 times.
The Council wondered what would happen if all the assumptions in the
authors’ study were varied together. RAND
did such experiments and could not lower the cost effectiveness of drug
treatment beyond the level of 5 times more cost-effective than domestic
enforcement.
Foreign source country interdiction and enforcement efforts were quite
cost-ineffective in the authors’ study.
The Council had wondered whether this was caused by cost increases
entering into the price structure in an additive rather than a multiplicative
fashion. RAND provides a graph of
cocaine base prices and retail cocaine prices.
There does not seem to be a strong correlation between the two, and
therefore RAND feels comfortable with the additive price formulation.
In response to the Council’s criticism that the authors focus on
cocaine seizures as the sole measure of enforcement activity, RAND argues that
it also takes account of the seizure of assets, arrest sanctions, and
imprisonment as well as the effect of taking dealers off the street.
RAND does point out that the model is not sophisticated enough to
evaluate tactical choices. It is
directed at the larger strategic questions of enforcement versus treatment.
The Council feels that the authors’ study neglects non-monetary
aspects of the drug market and, in particular, search costs and the stigma of
arrest and imprisonment. RAND
points out the approach was to embody the price of arrest and punishment risks
into the price of cocaine. Modelling
stigma costs explicitly resulted in no real alteration of the results.
For search costs, RAND quotes research results that cocaine is
relatively easy to find. One
study found that experienced heroin users spent 35 minutes shopping for a $26
purchase. Cocaine and heroin
users reported that they knew of between 10 and 20 suppliers of their drug of
choice. Thus it seems unlikely to
RAND that search costs will increase by much because of stronger enforcement
efforts.
The RAND study dates from a period when it was commonly believed that
the demand for illegal substances was quite price-inelastic, and the numerical
value of -0.5 was chosen. Since
then, research results have shown a much higher price elasticity for illicit
drugs. Doubling the price
elasticity to -1.0 still leaves treatment four times more cost-effective than
enforcement. In response to the
criticism that there are a number of important different demand elasticities
for initiation and intensification of use, RAND admits that these are key
parameters but notes that even today there is little empirical evidence about
their relative magnitudes. A
number of alternative assumptions were run, but treatment remains more
cost-effective than enforcement. The
effect of the availability of other alternative drugs on the demand for
cocaine is still not known at an empirical level.
RAND agrees with the Council that the authors’ model has not been
validated, but believes that good data are not available to enable a
validation exercise to be run. RAND
argues that most of the areas of concern raised by the Council do not affect
the relative cost-effectiveness of demand and supply control policies, apart
from the treatment parameters and the additive price effect specifications for
source country policies in which foreign price increases are not grossed-up as
they work through the distribution chain.
RAND argues that it is unreasonable to expect any policy model to be
totally validated. This is not
the case with the management of the economy or with climate change.
RAND believes that its model meets a reasonable standard of
persuasiveness. Cocaine treatment
programs cost about $2,000 per admission in 1992 and had relapse rates of 60%
or 80%. Although these numbers
seem to say that treatment programs are not effective, interdiction and source
country control methods and domestic law enforcement have a very limited
ability to change the price of cocaine.
D. Discussion
The RAND program of research on drug policy is impressive.
The disciplines of economics, sociology, criminology and economic
anthropology have been brought together constructively to address a major
problem facing U.S. society. The
long-term focus has been maintained, and an interesting program that builds
upon earlier research in a coherent way has been sustained for more than a
decade. However, the U.S.
government has not been convinced that its policies are more costly and less
effective than they need to be. Nor
has the National Research Council been convinced.
Indeed, it is now beginning its own research program on drug policy.
The way that the authors’ study uses previous research makes it hard
to evaluate this study on its own. In
addition, data and calculations of varying historic vintages are combined
together, and the reader has to wonder by how much things have since changed.
For example, the risk of arrest and imprisonment is priced in the
model. When enforcement
activities increase the chances of dealers being caught, they also increase
the chances of being found guilty, imprisoned and having assets forfeited.
All this is folded into the pay structure for drug dealers.
But would it be unreasonable to expect the risk premiums to stay
constant as labour market conditions change? During a period of high
unemployment in the 1980s, there might be a ready supply of potential labour,
but during a period of lower inner-city unemployment such as the 1990s,
perhaps higher-risk premiums would have to be paid to attract potential
dealers into the trade. An
additional problem is that it is very difficult for anyone else to validate
the numbers chosen by RAND, and thus to have faith in the results presented by
the RAND model.
The information needs of the RAND model are high.
On the demand side, the aim is to model separately the dynamics of the
number of drug users, both heavy and light users, and the average consumption
of each type of user. Total
consumption is derived by adding up light and heavy user consumption.
For this model to work, the transition probabilities, the effect of
price on these transition probabilities, and the consumption price elasticity
need to be known. The authors
work with just one elasticity, which is divided by two for some uses and
divided by four for others. It
should be pointed out that, in response to the National Research Council
critique, RAND had in fact performed some sensitivity analysis of these
elasticities. There still remain
the hard questions of modelling philosophy.
The model is quite disaggregated with lots of detail added, but without
the detailed individual response parameters being available.
It is not clear from statistical theory that this approach produces
better results than a more modest, less detailed model based on estimated
parameters.
As previously remarked, cost-effectiveness studies may select a target
that, in some policy senses, is inadequate.
Reducing consumption by the same amount through demand or supply
control is not the same. The new
equilibrium price will be higher under supply control programs than under
demand control. In the authors’
study, total spending on cocaine increases under supply control but decreases
under demand control. The number
of users still in the cocaine market also differs.
The authors estimate that there would be a 0.37% decrease in the number
of users under supply control, compared with a 0.22% decline under demand
control, for the target 1% decrease in total cocaine consumption.
Under both policies, the highest relative decline is for heavy users
whose number decrease by twice as much under treatment programs as under
supply control. It must be
remembered that the authors’ model treatment programs take only heavy users.
Under the demand control scenario, light users decline in number by
0.05%, compared to 0.33% under supply control.
The authors do attempt to extend the objective function towards a more
useful measure of the impact on society rather than just the reduction in drug
consumption They consider
societal costs, including the costs of crime and the costs of productivity
losses. The authors believe that
the “state of harm” measurement is rudimentary, and that evidence is
needed to support the assumptions they make.
They assume that the cost to society of crime caused by cocaine users
is proportional to spending on cocaine, and they also assume that productivity
losses are proportional to the consumption of cocaine, where productivity
measurements do not include time in prison.
When measured in terms of the societal costs, domestic enforcement is
14.6 times more costly than treatment programs.
CONCLUSION
Knowing how much the state spends on its various activities is a
democratic right; but, given we live in countries in which government goods
and services are delivered by multipurpose agencies, attempts to estimate
precise spending on a particular narrow area of public interest – be it drug
abuse or terrorism – may be an exercise in cost allocation, with crude
approximation replacing precise measurement.
A societal concern about illness and social problems may drive us to
look at the magnitudes involved more closely.
The magnitude of a problem can be measured in many ways.
For example, injection drug use with unhygienic needles can lead to the
transmission of diseases such as HIV/AIDS and hepatitis.
Illness and death can follow. Obviously,
one measure of the magnitude of the problem of dirty needles is the number of
HIV/AIDS and hepatitis cases caused; a related measure would be the amount of
medical drugs needed to maintain the health of the infected individuals; and a
final measure might be the number of deaths caused.
Using cash as a measure is the next step in complexity in measuring the
size of a problem. An economist
might be asked to put dollar values on these magnitudes.
Medical drugs are bought in a marketplace and their cost is therefore
easily measured. Estimating the
value of a premature death is a harder exercise, involving not only a range of
economic considerations but also significant ethical questions, and different
economists might give different answers.
Before embarking on the adventure of finding which economist is right,
it is useful to stop and ask whether, why and which information is needed.
Suppose you are a decision maker tasked to choose whether to supply new
needles periodically or chlorine bleach to clean the existing needles.
How to find the answer is fairly obvious, and does not require an
economist to value the lives lost; all that is required is a controlled
experiment to see which method produces the lower infection rate.
Obtaining an accurate estimate of the value of a human life lost is no
substitute for knowing the infection rates.
The two types of studies discussed above demonstrate these two
different approaches. If it is
necessary to estimate the magnitude of the drug problem, then, as has been
summarized earlier, there are a number of technical issues of methodology, of
raw data and, as in any real world measurement exercise, a question of which
corners can be cut without too much scientific discomfort.
These questions are illustrated in the discussion of the cost studies
in the first part of this paper. If,
on the other hand, it is necessary to compare policies, a different exercise
is needed. The RAND study
discussed in the second part of this paper is an example of such an exercise.
It is characterized by impact coefficients which model how altering the
policy variables, such as interdiction effort or the availability of drug
treatment places, affects the target variable, cocaine consumption.
There seems to be no debate between analysts about the differences
between these two sorts of exercises, economic cost analysis and policy
analysis. However, some analysts
appear to believe that cost analysis is a necessary preliminary exercise to
policy analysis modelling, and some do not.
The nature of the policy modelling exercise will depend on the problem
itself. Some analysts have
concerns about applying the Cost Of Illness methodology to drug problems.
A primary cause of this concern is based on the major difference
between an illness, such as polio, that is randomly visited upon an
individual, and a drug addiction, which involves an element of choice.
Remove the scourge of polio, and the consequences are unambiguous:
children do not walk with leg-braces or need iron lungs.
If by some magic, however, one could remove cocaine from the hands of
addicts, the question is what other substance or behaviour would be
substituted.
Studies of illness, quite reasonably, present a cost estimate of
achieving a feasible goal that could be realized by society upon eradication
of the disease. Nobody wants the
disease. Illicit drugs do give
pleasure, and it seems discordant to our notions of how people behave or to
any reading of the social history of drugs to think that there is any way in
which the estimates of the total costs of illicit drugs in economic cost
studies represent a cost that could be returned to society.
This is not to say that the choice of drug policies is unimportant, but
that the magnitudes shown in cost studies cannot be realized by society.
In the aftermath of the policy storm raised by the RAND study discussed
above, one may well come to the conclusion that policy modelling exercises are
extremely difficult even in the country with the richest set of data resources
and a very well funded, high-quality research community.
But evidence-based decision-making is now gaining ground in our health
care system, and it is perhaps not a forlorn hope that it will spread further
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The range of the study is impressive in that very few items of cost
remain unestimated. On the other
hand, there has been strong criticism of how some of the estimates have been
developed, which will be discussed later.
TABLE
6
BREAKDOWN
OF THE SOCIAL COST OF ILLICIT SUBSTANCE ABUSE