The peer-reviewed research behind how we frame the justice system — grouped by the claim it supports. We link the studies, and we flag where the evidence is genuinely mixed rather than pretending it is settled.
Backs the ecosystem thesis and the jail page’s “housing” connection: losing housing raises low-level enforcement contact, and the causal arrow runs both ways.
Anti-homeless enforcement (move-along orders, citations) churns people through the system and reproduces homelessness without reducing disorder.
Scoping review: housing instability and legal-system contact feed each other; housing belongs at the center of intervention, not the margins.
Mass incarceration and homelessness share structural drivers and worsen each other in a feedback loop.
Backs the alternatives evidence review: supportive housing / Housing First reliably cuts livability arrests and jail time — the average effect on crime overall is smaller and depends who you house.
Randomized controlled trial: scattered-site Housing First significantly lowered the number of sentences vs. treatment as usual.
Months in Housing First — not criminal history — predicted decreases in jail days and bookings over two years; most convictions were misdemeanors.
Housing placement decreased arrests and incarceration — mostly from fewer livability and drug-related charges, not violent or property crime.
Arrests fell significantly after supportive-housing placement, tapering over a 12–18-month stabilization period.
The honest counterweight: on average, Housing First has little impact on criminal-justice involvement; forensic supports may need to be layered in.
Backs the jail page’s “work” connection: steady, decent work predicts not coming back — but it is job quality and stability, not “any job” or any program, that moves the needle.
Across 1.7M releases, higher-wage construction/manufacturing openings at release cut recidivism; low-wage jobs did not.
Releasees returning to counties with higher low-skilled wages recidivated significantly less.
Employment stability reduced recidivism even for those with no prior work history and extensive criminal records.
The caveat: community employment programs alone did not reliably reduce recidivism — the effect is about real, quality jobs, not job-readiness classes.
Backs the jail page’s “health” connection: it is untreated substance use and co-occurring disorders — not mental illness alone — that drive repeat justice contact.
Across 61,000+ inmates, co-occurring psychiatric + substance use disorder carried a substantially higher risk of multiple incarcerations than either alone.
In a 24,000-person urban jail cohort, substance use — not mental illness by itself — was the driving force behind repeat jail contact.
Substance use disorder carried the highest rearrest rate; mental illness alone was not significantly associated with rearrest.
Housing, financial, and social-support needs raised substance-use odds — and poor mental health mediated those effects onto reoffending.
Backs the alternatives review: adult drug courts and treatment-as-alternative-to-incarceration reduce recidivism; juvenile courts and post-graduation effects are weaker.
Across 154 evaluations, adult drug-court participation was associated with a recidivism drop analogous to 50% → 38%, lasting up to three years; effects largest for non-violent participants.
Drug-court participants were less likely to reoffend than comparison offenders; higher-quality studies also found positive results.
Nationwide Swedish cohort: contract treatment reduced substance misuse, adverse health events, and crime charges vs. parole or probation.
Limited but promising evidence for improvements in recidivism, substance use, and psychosocial outcomes; pre-booking diversion is under-studied.