In this paper we study the causal impact of police on crime by looking at what happened to crime before and after the terror attacks that hit central London in July 2005. The attacks resulted in a large redeployment of police officers to central London boroughs as compared to outer London - in...

In this paper we study the causal impact of police on crime by looking at what happened to crime before and after the terror attacks that hit central London in July 2005. The attacks resulted in a large redeployment of police officers to central London boroughs as compared to outer London – in...

More policing reduces crime but little is known about the mechanism. Does policing deter crime by reducing its attractiveness, or because it leads to additional arrests of recurrent criminals? This paper provides evidence of a direct link between policing and arrests. During shift changes a...

Crime fell sharply in the United States during the Great Recession, at a time of deep economic decline. This was a puzzle: crime is expected to rise, not fall, when unemployment rises. Using a novel identification strategy, I show that unemployment insurance (UI) benefit extensions can account...

We examine the effect of medical marijuana laws (MML) on crime treating the introduction of MML as a quasi-experiment and using three different data sources. First, using data from the Uniform Crime Reports, we find that violent crimes such as homicides and robberies decrease in states that...

This paper examines the impact of schools on crime in urban neighborhoods. The change in the public educational landscape with the rise of charter schools in Philadelphia provides a natural experiment to examine the effects that school locations have on crime rates. In this paper, we use data on...

Organized crime affects security, development, and democracy worldwide, but not much is known about its social consequences. We study how exposure to the presence of organized crime groups shapes the social capital of Italian citizens, including political participation, civic engagement, and...

In this paper we study the causal impact of police on crime by looking at what happened to crime before and after the terror attacks that hit central London in July 2005. The attacks resulted in a large redeployment of police officers to central London boroughs as compared to outer London - in...

In this paper we study the causal impact of police on crime by looking at what happened to crime before and after the terror attacks that hit central London in July 2005. The attacks resulted in a large redeployment of police officers to central London boroughs as compared to outer London - in...

When considering issues of measuring welfare beyond gross domestic product (GDP), a key ongoing, but unfinished, agenda concerns how to measure the outputs of goods and services which are "free at the point of delivery". Public services such as schools and health services are major examples of...