Prison And Crime: Much More Than You Wanted To Know

An exhaustive, even-handed deep-dive on whether prison reduces crime, refereeing three rival reviews (using the pro- and anti-incarceration reviews as an Overton window and the neutral Nagin as tiebreaker). Cleanly separates deterrence (real but small, ~1% per extra year, mostly drug crime), incapacitation (large, ~7 crimes per prisoner-year), and aftereffects (unclear; only the contrarian Roodman argues they fully cancel incapacitation, plausibly only for short sentences in high-incarceration regimes). Demolishes the 'just lock up the power-law superoffenders' shortcut (Sweden, California Three Strikes, the Netherlands, El Salvador), insists everything is about the margin, and lands the practical conclusions: certainty of apprehension beats severity, prison is less cost-effective than police (~$8,500 vs ~$3,000 per crime), and the California shoplifting failure is about not arresting at all.

Quality 84 · Excellent. A model of rigorous, calibrated, fair policy analysis - one of his best deep-dives - that genuinely resolves a confused literature and the public's 'prison doesn't work' muddle, with original synthetic framing (the margins; the deterrence/incapacitation/aftereffects decomposition). Just below the very top because the underlying findings are established criminology that he synthesizes rather than originates. Excellent, upper end.

Claude’s paradigm shift 52 · Moderate. The core findings (incapacitation works, deterrence weak, certainty over severity, the age-crime curve) are established criminology; the fresh contribution is the lucid synthesis, the resolution of the expert-vs-public confusion, and the marginal-analysis frame. Moderate.

Real-world impact 1 · Negligible. A rigorous, even-handed deep-dive that genuinely clarifies a confused incarceration literature for readers; the topic (prison policy) is highly material, but the post itself synthesizes established criminology and has no demonstrated effect on actual sentencing policy or practice — its impact is on understanding the debate, so low RWI.