States with some form of both registration and licensing have greater success keeping firearms initially sold by dealers in the state from being recovered in crimes than states without such laws.1

  1. Daniel W. Webster et al., Relationship Between Licensing, Registration, and Other Gun Sales Laws and the Source State of Crime Guns, 7 Inj. Prevention 184, 188-89 (2001). The study included jurisdictions with concealed carry permits and dealer sales reporting, which have elements of licensing or registration but are not comprehensive licensing or registration systems. ⤴︎