Abstract This article provides the first causal estimates on the popular, cost-saving practice of diversion in the criminal justice system, an intervention that provides offenders with a second chance to avoid a criminal record. We exploit two natural experiments in Harris County, Texas where first-time felony defendants faced abrupt changes in the probability of diversion. Using administrative data and regression discontinuity methods, we find robust evidence across both experiments that diversion cuts reoffending rates in half and grows quarterly employment rates by nearly 50% over 10 years. The change in trajectory persists even 20 years out and is concentrated among young black men. An investigation of mechanisms strongly suggests that stigma associated with a felony conviction plays a key role in generating these results. Other possible mechanisms including changes in incarceration, other universal adjustments in policy or practice, and differences in criminal processing are ruled out empirically.

For a cluster-robust t-statistic under cluster heterogeneity we establish that the cluster-robust t-statistic has a gaussian asymptotic null distribution and develop the effective number of clusters, which scales down the actual number of clusters, as a guide to the behavior of the test statistic. The implications for hypothesis testing in applied work are that the number of clusters, rather than the number of observations, should be reported as the sample size, and the effective number of clusters should be reported to guide inference. If the effective number of clusters is large, testing based on critical values from a normal distribution is appropriate.

Abstract In 2001 a large and sustained supply shock halted a heroin epidemic in Australia. We use drug offenses to identify individual opioid users and examine how the shock affected their mortality risks and criminal activity over the next eight years. Initially, gains from fewer overdoses are offset by drug substitution and more crime, including homicides. Most adverse effects dissipate over time, whereas persistent mortality reductions save the lives of around one in 48 individuals in our sample. Our results demonstrate that reducing the supply of illicit opioids can lead to meaningful longer-term improvements, even when the short-term effects are ambiguous.