Loading the player...
Download :
Video
Contributor(s): Mirko Draca
Released on 26 May 2009
What effect does raising the number of police have on crime? It might seem obvious that more police means fewer crimes - but things aren't that simple. For a start, there's the so called "endogeneity problem". Research economist Mirko Draca explains how the July 2005 terrorist attacks became a "natural experiment".
Department
Research
Related links