Shift Drug Policy from Criminal to Health Approach
Grade B — Moderate EvidenceDecriminalize personal drug use, redirect enforcement budget to treatment. Based on Portugal (2001).
Rank #9 of 22 policies
📊 Bradford Hill Criteria Scores
💥 Impact Breakdown
🧪 Natural Experiments
Real-world before/after data from jurisdictions that implemented this policy.
Portugal — Drug Decriminalization
Intervention year: 2001 · Decriminalized personal possession of all drugs; shifted resources to treatment
Switzerland — Supervised Drug Injection Facilities
Intervention year: 1986 · Opened supervised injection rooms; heroin-assisted treatment (HAT) from 1994; 4-pillar drug policy
Uruguay — Cannabis Legalization and Regulation
Intervention year: 2013 · First country to fully legalize cannabis production, sale, and consumption under state regulation
🌍 Drug Policy by Country
How countries compare on this policy domain. The US row is highlighted.
| Country | Approach | Drug Deaths/100K | Incarceration/100K | Treatment Access |
|---|---|---|---|---|
| Singapore | prohibitionist | 0.1 | 181 | 30% |
| Japan | prohibitionist | 0.2 | 38 | 35% |
| Portugal | decriminalization | 0.3 | 111 | 75% |
| Czech Republic | decriminalization | 0.5 | 181 | 58% |
| Uruguay | legalization | 1.2 | 322 | 40% |
| Switzerland | harm-reduction | 1.5 | 75 | 72% |
| Netherlands | harm-reduction | 1.8 | 59 | 68% |
| New Zealand | mixed | 1.9 | 165 | 55% |
| Germany | harm-reduction | 2.2 | 67 | 62% |
| Canada | mixed | 5.2 | 104 | 55% |
| Norway | harm-reduction | 5.8 | 56 | 65% |
| Australia | mixed | 6.8 | 160 | 50% |
| United Kingdom | prohibitionist | 7.6 | 129 | 52% |
| Sweden | prohibitionist | 9.3 | 57 | 45% |
| United States | prohibitionist | 32.4 | 531 | 28% |
📋 Policy Details
Portugal decriminalized in 2001: drug deaths dropped 80%, HIV among users dropped 90%, treatment uptake tripled. US spends $40B/yr on drug enforcement with zero measurable reduction in drug deaths (r=0.026). Czech Republic, Switzerland, Netherlands show similar results.
🔬 Evidence Assessment: Bradford Hill Criteria
The Bradford Hill criteria are nine principles used to establish evidence of a causal relationship between a policy intervention and its outcomes. Originally developed for epidemiology (1965), they provide a structured framework for evaluating whether an observed association is truly causal. Each criterion is scored from 0 to 1.
How large is the association between the policy and the outcome? Larger effect sizes increase confidence in causation.
Has the relationship been observed across different populations, settings, and times? Replication strengthens causal claims.
Does the policy change precede the outcome change? Temporal ordering is a necessary condition for causation.
Is there a dose-response relationship? More of the policy leads to more of the effect? Gradients support causation.
Is there evidence from randomized controlled trials or natural experiments? Experimental evidence is the gold standard.
Is there a plausible mechanism explaining how the policy causes the outcome? Mechanistic understanding increases confidence.
Does the causal interpretation fit with existing knowledge? The relationship should not contradict established facts.
Are there analogous policies that have produced similar effects? Similar interventions with known effects support the claim.
Is the effect specific to this policy rather than a general phenomenon? Specific associations are more likely causal.
How is the Causal Confidence Score calculated?
The Causal Confidence Score (CCS) of 70% is a weighted average of the nine Bradford Hill criteria. Experiment and temporality receive higher weights since they provide the strongest evidence for causation. The CCS is then combined with the estimated effect magnitude to produce the Policy Impact Score (PIS) of 57%.
See the Optimal Policy Generator paper for full methodology.
Analysis: · Optimitron OPG