1United Nations, 2002, "World Population Ageing: 1950 - 2050", Department of Economic and Social Affairs, Population Division, New York.
2Martin Feldstein, 1974, "Social Security, Induced Retirement and Aggregate Capital Fonuation", Journal of Political Economy, Vol. 82, No. 5 (September/October).
3World Bank, Averting the Old- Age Crisis: Policies to Protect the Old and Promote Growth, New York: Oxford University Press, 1994.
4Nicholas Barr, 2000, "Reforming Pensions: Myths, Truths, and Policy Choices", IMF Working Paper, WP/ 00/139.
5John Williarmon, and Matthew Williams, 2003, "The Notional Defined Contribution Model: An Assessment of the Strengths and Limitations of A New Approach to the Provison of Old Age Security", CRR WP2003 - 18, Center for Retirement Research at Boston College, http: //www. be. edu/crr.
