Testing for Structural Breaks in the Evaluation of Programs

A standard methodology in program evaluation is to use time series variation to compare pre- and post-program outcomes. However, when the timing of a break in a statistical relationship can be determined only by looking at the data, then the usual distribution of the...

The Illegal Supply of Firearms

The case for focusing regulatory and enforcement efforts on the illegal supply of firearms to criminals rests on the belief that a supply-side approach has the potential to reduce the use of guns in violence. The case against this focus follows from the belief that...

Criminal Records of Homicide Offenders

Context Homicide prevention strategies can be either targeted toward high-risk groups or addressed to the population at large. One high-risk group of particular interest is adults with a criminal record. But the prevalence of a criminal record among homicide offenders...
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