TY - RPRT A1 - Lesthaeghe, R. A1 - Neidert, L. A1 - Surkyn, J. T1 - Household formation and the ‘Second demographic transition’ in Europe and the U.S. Insights from middle range models Y1 - 2006 UR - http://sdt.psc.isr.umich.edu/pubs/online/rl_romantic_unions_paper.pdf ER -