RT Article T1 Cognitive ability and the division of labor in urban ghettos: Evidence from gang activity in U.S. data JF The journal of socio-economics VO 44 SP 140 OP 149 A1 Seals, Alan A2 Stern, Liliana V. LA English YR 2013 UL https://krimdok.uni-tuebingen.de/Record/1912482185 DO 10.1016/j.socec.2012.11.003