John Donohue and his colleagues assessed the impact of "right-to-carry" (RTC) laws on crime rates. These laws make it easier to get a carry permit. Donohue et al. claim that their analysis indicates that, contrary to what nearly all other researchers have found, these laws increase violent...

In a highly debated paper, Lott & Mustard (1997) found that allowing citizens to carry concealed handguns reduced crime. Since then, numerous researchers have questioned the validity of the findings. In addition, ongoing work has shown there is an important spatial component to crime. In this...

Analyzing county level data for the entire United States from 1977 to 2000, we find annual reductions in murder rates between 1.5 and 2.3 percent for each additional year that a right-to-carry law is in effect. For the first five years that such a law is in effect, the total benefit from reduced...

In March 2018, hundreds of thousands of young people walked out of school and marched on their local statehouses and on the U.S. Capitol in Washington, D.C., to advocate for stricter controls on gun sales and ownership. The March for Our Lives was initially organized by students at Margery...

To what extent, and under what conditions, does access to arms fuel violent crime? To answer this question, we exploit a unique natural experiment: the 2004 expiration of the U.S. Federal Assault Weapons Ban exerted a spillover on gun supply in Mexican municipios near Texas, Arizona and New...