TY - JOUR A1 - Liefbroer, A.C A1 - Dourleijn, E. T1 - Unmarried cohabitation and union stability: Testing the role of diffusion using data from 16 European countries Y1 - 2006 DO - 10.2307/4137194 JF - Demography VL - 43 IS - 2 SP - 203 EP - -221 ER -