TY - JOUR A1 - Kley, S.A. A1 - Mulder, C.H. T1 - Considering, planning, and realizing migration in early adulthood. The influence of life-course events and perceived opportunities on leaving the city in Germany Y1 - 2010 DO - 10.1007/s10901-009-9167-8 VL - 25 IS - 1 ER -