Violent crime !== Gun violence. EDIT: Oh, and what DanBC said as well. EDIT#2: I hope I'm not remiss in pointing out the irony of you posting links to studies

Violent crime !== Gun violence. EDIT: Oh, and what DanBC said as well. EDIT#2: I hope I'm not remiss in pointing out the irony of you posting links to studies when your OP started out by saying "do we need studies?".