of criminals, and the pattern of their preferences. The methodology used relies on the analysis of the crime …

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 …

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 …

More policing reduces crime but little is known about the mechanism. Does policing deter crime by reducing its …

environment. Using geocoded crime data and a novel source of within-city spatial and temporal variation in punishment severity, I … consistent with police treating enforcement effort and punishment severity as complementary. I also find that citywide crime and …

Do reductions in arrests increase crime? We study line-of-duty deaths of police officers, events that likely impact … contrast, we find no evidence of an increase in crime or a change in victim reporting through 911 calls. There is also no … apparent threshold of arrest decline beyond which crime increases. Our findings suggest that enforcement activity can be …