Objective To evaluate the association between US state policies that establish age 18 or 21 years as the minimum purchaser age for the sale of handguns and adolescent suicide rate. Design Regression discontinuity and difference-in-differences analyses. ...
Objective To determine whether restrictiveness-permissiveness of state gun laws or gun ownership are associated with mass shootings in the US. Design Cross sectional time series. Setting and population US gun owners from 1998-2015. Exposure An...
