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....

Adding to the extensive political and legal debates on data retention, this is the first study to analyse the impacts of data retention on crime prevention in Europe. Using an estimator that captures dynamic effects and is robust to heterogeneous treatment effects, we find a significant negative...

Data from 25 large U.S. cities is assembled to estimate the impact of the onset of the COVID-19 pandemic on crime. There is a widespread immediate drop in both criminal incidents and arrests most heavily pronounced among drug crimes, theft, residential burglaries, and most violent crimes. The...

The public finance literature tells us that user fees will introduce market-like efficiency to public good provision. Meanwhile, criminal justice scholars note that criminal justice fees have run amok, causing crippling debt, undermining reentry efforts, and raising civil rights and...

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...

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...

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...

After a spate of protests touched off by high-profile incidents of police use of force, there has been a renewed focus on whether public scrutiny shapes policing behavior, otherwise known as the Ferguson Effect. This paper shows that after police killings that generate significant public...