Drug Courts — Randomized Trial Evidence Base

Summary

Drug courts emerged from the recognition that the standard prosecution model — charging, convicting, and incarcerating drug-involved offenders — was neither effective at reducing drug use nor cost-efficient. The alternative: treat addiction as a health problem requiring sustained treatment and judicial accountability, not a moral failure requiring punishment. The RCT evidence is among the strongest in criminal justice policy: participants in drug courts have 8–14 percentage point lower re-arrest rates than comparable offenders receiving standard prosecution. The mechanism combines treatment access, frequent accountability (drug tests, court appearances), and a working relationship with a judge who knows the defendant's progress. The cost evidence is equally compelling: drug court costs roughly $5,000 per participant; incarceration costs roughly $30,000 per year. The program is one of the clearest examples of an evidence-based reform that is simultaneously more effective and cheaper than the status quo.

Research question

"Do drug courts — which divert drug-involved offenders from incarceration into judicially supervised treatment — reduce recidivism and substance use more than standard prosecution?"

Methodology

Result

Positive

Recidivism: −8 to −14 pp vs. standard prosecution in RCTs; drug use: significant reduction while in program, mixed evidence of persistence; incarceration days: substantially fewer during supervision period; cost savings: $3,000–$13,000 per participant vs. incarceration

Evidence strength

Strong

Randomized trial, replicated across multiple sites or studies.

Replication status

Replicated