Both those who study crime and those who fight it agree that crime is not spread evenly across city landscapes. Rather, clusters of crime--a few "hot spots"--host a vastly disproportionate amount of criminal activity. Even within the most crime-ridden neighborhoods, crime concentrates at a few locations while other areas remain relatively crime-free. So if police focus their limited resources at these problem places-a practice known as hot spots policing-they will be better positioned to lower citywide crime rates, and do it more efficiently.

In Policing Problem Places, Anthony...