In states with shall issue permits, the crime rate of permit holders is way lower than the general population. Now if you look at constitutional carry states, it becomes messy as every bad person committing a gun crime (as in urban gun violence) can be counted as a constitutional carrying criminal (if they did not have a disqualifying felony ban on having a guns), even they had been an illegal carrier before.
However, the thing to look at is the overall gun crime rate and see if there is a discontinuous, sharp increase in handgun crime with the passage of the new laws. This must be broken down by areas also as increases in urban crime are different processes. You would have to look at areas that previously had low rates with shall issue demographics and see if those areas show a sharp increase in gun crime with CC. Looking at overall state rates is pretty meaningless if you want to see a casual link to Constitutional Carry.
One might also ask the general population who didn't carry if they are now prone to carry as the state is constitutional and they didn't before. What are the demographics of those folks?
However, the thing to look at is the overall gun crime rate and see if there is a discontinuous, sharp increase in handgun crime with the passage of the new laws. This must be broken down by areas also as increases in urban crime are different processes. You would have to look at areas that previously had low rates with shall issue demographics and see if those areas show a sharp increase in gun crime with CC. Looking at overall state rates is pretty meaningless if you want to see a casual link to Constitutional Carry.
One might also ask the general population who didn't carry if they are now prone to carry as the state is constitutional and they didn't before. What are the demographics of those folks?