TY - CHAP A1 - Van de Kaa, D.J. T1 - The true commonality: In reflexive modern societies fertility is derivative Y1 - 2004 A3 - Billari, F.C. A3 - Frejka, T. A3 - Hobcraft, J. A3 - Macura, M. A3 - van de Kaa, D.J. T2 - Discussion of paper ‘Explanations of the fertility crisis in modern societies: A search for commonalities’. Population Studies 57(3): 241-263, by John Caldwell and Thomas Schindlmayr SP - 77 EP - -80 T3 - Population Studies 58(1): 77-92 ER -