RT Article T1 Prison commitments, crime, and unemployment: A theoretical and empirical specification for the United States, 1933-1985 JF Journal of quantitative criminology VO 7 IS 2 SP 155 OP 199 A1 Cappell, Charles L. A1 Sykes, Gresham LA English YR 1991 UL https://krimdok.uni-tuebingen.de/Record/164011310X K1 Freiheitsstrafe K1 Kriminalitätsrate DO 10.1007/BF01268628