RT Article T1 Are idle hands the devil’s workshop? Incapacitation, concentration, and juvenile crime JF American economic review VO 93 IS 5 SP 1560 OP 1577 A1 Jacob, Brian Aaron A2 Lefgren, Lars LA English YR 2003 UL https://krimdok.uni-tuebingen.de/Record/1912459647 DO 10.1257/000282803322655446