RT Article T1 School vs. mail surveys: disentangling selection and measurement effects in self-reported juvenile delinquency JF European journal of criminology VO 13 IS 1 SP 92 OP 110 A1 Cops, Diederik A2 De Boeck, Arne A2 Pleysier, Stefaan LA English YR 2016 UL https://krimdok.uni-tuebingen.de/Record/1647323533 K1 Juvenile delinquency K1 Measurement effects K1 Selection effects K1 Self-report survey research