Longitudinal data analysis methods are powerful tools for exploring scientific questions regarding change and are well suited to evaluate the impact of a new policy. However, there are challenging aspects of policy change data that require consideration, such as...
Objective To determine if any of five different state gun laws were associated with firearm mortality: (1) “shall issue” laws permitting an individual to carry a concealed weapon unless restricted by another statute; (2) a minimum age of 21 years for...
