contact, and holds officers accountable for crime in their assigned area. The plan warranted a comprehensive training program … reduction in several types of crime attributable to the training program, ranging from around .13 of a standard deviation for … homicides to .18 of a standard deviation for brawls. These impacts are driven by very large effects in high crime areas and very …

We study the effects of broken windows policing on crime using geo-located crime and arrest reports for 80 Colombian … least one crime report. In the following periods, crimes decrease both in the place of the arrests and the surroundings …. With many treated grids and many places exposed to spillovers, these effects add up. On aggregate, the crime reduction …