Mandatory minimum sentences deter crime

Quality and quantity of direct evidence for or against the claim — RCTs, systematic reviews, natural experiments, large cohort studies.

Nagin's deterrence literature reviews find certainty of apprehension has real deterrent value, but sentence severity (the mechanism mandatory minimums rely on) shows weak, inconsistent effects on crime rates.

Whether the proposed mechanism is valid and established — does the how make sense, or are there fundamental flaws in the causal logic?

The incapacitation half of the mechanism is plausible and partly supported; the deterrence-through-severity half is undermined by evidence that most offenders do not have accurate knowledge of specific sentencing exposure.

Degree of agreement among domain experts and relevant scientific or policy bodies — depth and quality of consensus, not just majority opinion.

Criminologists broadly distinguish certainty from severity effects, with most agreeing severity-focused policies like mandatory minimums are less effective than certainty-focused enforcement, though disagreement remains on magnitude.

Whether findings hold across independent studies, populations, and contexts — resistance to p-hacking and publication bias.

The US incarceration surge (quadrupling 1980-2000) did not produce a proportional crime decline relative to the timing of drops in states with less aggressive sentencing, though isolating mandatory minimums specifically from broader incarceration policy remains methodologically contested.