We estimate the effectiveness of the Edward Byrne Memorial State and Local Law Enforcement Assistance Program, a grant program authorized under the 1988 Anti-Drug Abuse Act to combat illicit drug abuse and to improve the criminal justice system, on racial bias in policing. Funds for the Byrne...

We survey the literature on index crime, paying particular attention to spatial issues. We note the contrasting descriptive traditions of Lombroso (characteristics matter) and Beccaria (incentives matter), and the contrasting policy traditions of incapacitation (predict who will offend and keep...

We estimate the causal effect of harsher speeding punishments on future driving behavior of cited drivers. To account for the fact that punishments are not randomly assigned, we leverage variation in ticket-writing practices across highway patrol officers in Florida. The fine associated with a...

Die Piraterie am Horn von Afrika hat in den letzten Jahren deutlich zugenommen: 217 Schiffe berichteten 2009, von somalischen Piraten angegriffen worden zu sein. Obwohl damit weniger als ein Prozent aller Schiffe, die den Golf von Aden 2009 durchquerten, angegriffen wurde, sorgt somalische...

Do firearm purchase delay laws reduce aggregate homicide levels? Using quasi-experimental evidence from a 6-month countrywide gun demand shock starting in late 2012, we show that U.S. states with legislation preventing immediate handgun purchases experienced smaller increases in handgun sales....

Do firearm purchase delay laws reduce aggregate homicide levels? Using quasi-experimental evidence from a 6-month countrywide gun demand shock starting in late 2012, we show that U.S. states with legislation preventing immediate handgun purchases experienced smaller increases in handgun sales....

Using Rio de Janeiro's slum pacification program initiated in 2008, we study the effect of policies aimed at fighting drug gangs on crime. By combining a proxy variable with a simple structural model, we correct the bias resulting from the increase in unobserved crime reporting. We find that the...

I exploit a natural experiment to estimate the causal effect of police on crime. The American Recovery and Reinvestment Act increased funding for the Community Oriented Policing Services (COPS) hiring grant program from less than $20 million over 2005-2008 to $1 billion in 2009. Hiring grants...