We evaluate whether California's state proposition 47 impacted state violent and property crime rates. Passed by the …-level crime rates that exploit heterogeneity in the effects of the proposition on local criminal justice practices. We find little … evidence of an impact on violent crime rates in the state. Once changes in offense definitions and reporting practices in key …

, arrest increases the probability an offender is charged with a crime. Our findings argue against recent calls for a …

known about the effects of private police on crime. The current study examines the relationship between a privately …-funded university police force and crime in a large U.S. city. Following an expansion of the jurisdictional boundary of the private … police force, we see no short-term change in crime. However, using a geographic regression discontinuity approach, we find …

of fines on punishment and deterrence. Partial effects are effects on potential violators' and punishers' decisions when …

The empirical literature testing the economic theory of crime has extensively studied the relative importance of the … probability and the severity of punishment with reference to planned criminal activities. There are, however, also unplanned …

local crime rates. We assess the effects of a recent reform in California that caused a sharp and permanent reduction in the … violent crime and evidence of modest effects on property crime, auto theft in particular. These effects are considerably … considerably lower. We corroborate theses cross-county results with a synthetic-cohort analysis of state crime rates in California …

We study peer effects in crime by analyzing co-offending networks. We first provide a credible estimate of peer effects … criminal from each network that reduces total crime by the largest amount. Using longitudinal data, we are able to compare the … disappeared over time, we show that the theoretical predicted crime reduction is close to what is observed in the real world. We …