1. Becker, G.S., 1960, An economic analysis of fertility, in: Universities — National Bureau of Economic Research, Demographic and economic change in developed countries (Princeton University Press, Princeton, NJ) 209–231.
2. Becker, G.S., 1981, A treatise on the family (Harvard University Press, Cambridge, MA).
3. Berent, J., 1983, Family size preferences in Europe and USA: Ultimate expected number of children, Comparative Studies: ECE analyses of WFS surveys in Europe and USA (International Statistical Institute, Voorburg) 26.
4. Berent, J., E.F. Jones and M.K. Siddiqui, 1982, Basic characteristics, sample designs and questionnaires, Comparative studies: ECE analysis of WFS surveys in Europe and USA (International Statistical Institute, Voorburg.
5. Blake, J., 1974, Ideal family size among white Americans: A quarter of a century's evidence, Demography 3, 154–173.