An influential literature has used the aftermath of terrorist attacks to estimate large effects of police street … circumstances. This paper exploits a natural experiment that aimed to increase police presence in more than 6,000 well-defined areas … by police officers, we first document exogenous and discontinuous changes in patrolling intensity. We do not find that …

We present evidence that more ethnically fragmented communities spend, all else equal, more on police services than … less fragmented communities. We introduce a model of spending on police services which we use to interpret the data. In … spending on police services reduces the attractiveness of committing a crime. We also assume that being a victim of crime …