Similar title to Lutz, W. ORCID: https://orcid.org/0000-0001-7975-8145, Skirbekk, V., & Testa, M.R. (2006). The Low Fertility Trap Hypothesis: Forces that May Lead to Further Postponement and Fewer Births in Europe. IIASA Interim Report. IIASA, Laxenburg, Austria: IR-06-017