RT Article T1 Changing contexts: a quasi-experiment examining adolescent delinquency and the transition to high school JF Criminology VO 61 IS 1 SP 40 OP 73 A1 Freelin, Brittany N. A2 McMillan, Cassie A2 Felmlee, Diane H. A2 Osgood, D. Wayne LA English YR 2023 UL https://krimdok.uni-tuebingen.de/Record/1839619759 AB In a quasi-experiment, we examine whether changing schools during the transition from 8th to 9th grade influences adolescent delinquency, using a sample of more than 14,000 students in 26 public school districts (PROSPER study). The dataset follows students for eight waves from 6th through 12th grade and facilitates a unique, direct comparison of students who change schools with those who remain in the same school during this period. Results show that students who transition between schools report significantly less delinquency after the shift than those who do not, and that this difference persists through 10th grade. This decline is most pronounced when adolescents from multiple middle schools move to a single high school (i.e., multifeeder transitions). Students who transition between schools have fewer delinquent friends and participate in less unstructured socializing following the change in school environment, which partially mediates their reduced delinquency. Results provide some support for theories of differential association and routine activities. Our findings highlight the role of a crucial, yet understudied, life transition in shaping adolescent delinquency. The results from this quasi-experiment underscore the potential of alterations in social context to significantly dampen juvenile delinquency throughout high school. K1 PROSPER K1 Adolescence K1 Delinquency K1 Differential association K1 Friendship K1 Quasi-experiment K1 Routine Activities K1 school transition K1 Social Control K1 Unstructured socializing DO 10.1111/1745-9125.12320