RT Article T1 Decomposing the peer effect on adolescent substance use: mediation, nonlinearity, and differential nonlinearity JF Criminology VO 49 IS 4 SP 1235 OP 1274 A1 Zimmerman, Gregory M. A2 Vásquez, Bob Edward LA English YR 2011 UL https://krimdok.uni-tuebingen.de/Record/1628278595 K1 Drogenkonsum K1 Peer-Group-Einfluss K1 Gemeinde K1 Methodenfragen