, Volume 29, Issue 4, pp 601-642

The Effect of Incarceration on Re-Offending: Evidence from a Natural Experiment in Pennsylvania

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Abstract

Objectives

This paper uses a sample of convicted offenders from Pennsylvania to estimate the effect of incarceration on post-release criminality.

Methods

To do so, we capitalize on a feature of the criminal justice system in Pennsylvania—the county-level randomization of cases to judges. We begin by identifying five counties in which there is substantial variation across judges in the uses of incarceration, but no evidence indicating that the randomization process had failed. The estimated effect of incarceration on rearrest is based on comparison of the rearrest rates of the caseloads of judges with different proclivities for the use of incarceration.

Results

Using judge as an instrumental variable, we estimate a series of confidence intervals for the effect of incarceration on one year, two year, five year, and ten year rearrest rates.

Conclusions

On the whole, there is little evidence in our data that incarceration impacts rearrest.

Authors listed alphabetically. Support for this research was provided by the National Science Foundation (SES1024596). The viewpoints expressed herein are those of the authors and do not reflect the views or beliefs of the State of Alaska.