TY - RPRT A1 - Lutz, W. A1 - Skirbekk, V. A1 - Testa, M.R. T1 - The low fertility trap hypothesis: Forces that may lead to further postponement and fewer births in Europe Y1 - 2005 DO - 10.1553/populationyearbook2006s115 PB - Vienna Institute of Demography of the Austrian Academy of Science: 36p CY - Vienna IS - European demographic research papers; 2005-4 ER -