1. BECKER, G.S. and H.G. LEWIS (1974), " Interaction between Quantity and Quality of Children ", in Economies of the Family : Marriage, Children and Human Capital, edited by Theodore W. SCHULTZ, published for the National Bureau of Economic Research by the University of Chicago Press, pp. 81-90.
2. BURKHAUSER, R.V. and J.A. TURNER (1987), " A Time-Series Analysis of Social Security and its Effect on the Market Work of Men at Young Age ", Journal of Political Economy, vol. 86, no. 4, pp. 701-15.
3. CALMFORS, L. (1985), " Work Sharing, Employment and Wages ", European Economic Review, vol. 27, pp. 293-309.
4. CRAINE, R. (1970), " On the Service Flow from Labour ", Review of Economic Studies, vol. 40, pp. 39-46.
5. EHRENBERG, E.G. ( 1971 ), Fringe Benefits and Overtime Behavior, Lexington Book, London, 1971.