RT Book T1 Guns, drugs and juvenile crime: evidence from a panel of siblings and twins T2 Working paper series / National Bureau of Economic Research JF Working paper A1 Mocan, Naci A1 Tekin, Erdal LA English PP Cambridge, Mass. PB National Bureau of Economic Research YR 2003 UL https://krimdok.uni-tuebingen.de/Record/1176156055