Law enforcement

David Weisburd, recipient of the 2010 Stockholm Prize in Criminology, explains research showing that intensified police patrols in high-crime hot spots can substantially decrease crime without causing it to rise in other areas. He explains the effectiveness of policing that concentrates prevention efforts at less than 5 percent of all street corners and addresses where more than 50 percent of urban crime occurs. The evidence suggests that crimes depend not just on criminals, but also on policing in key places.