In 1997, Lott and Mustard published an important paper which found that right-to-carry concealed weapons laws reduce violent crime. Although Lott and Mustard appear to do all possible variations of the analysis, a closer reading reveals that the study might suffer from several possibly important...

A 1994 federal law bans possession of handguns by persons under 18 years old. Also in 1994, 11 states passed their own juvenile gun possession bans, and 18 states had previously passed bans, 15 between 1975 and 1993. These laws were intended to reduce homicides, but arguments can be made that...