1Williamson, J. B. and F.C. Pampel, Old-age security in comparative perspective. 1993: Oxford Univer- sity Press, USA.
2Feldstein, M. , The missing piece in policy analysis: social security reform. The American Economic Review, 1996. 86(2): p. 1-14.
3Kotlikoff, L. J. , K.A. Smetters and J. Walliser, Social security: privatization and progressivity. A- merican Economic Review, 1998. 88(2) : p. 137-141.
4Gordon, R. H. and A. S. Blinder, Market wages, reservation wages, and retirement decisions. Journal of Public Economics, 1980. 14(2) : p. 277-308.
5Munnell, A. H. , The economics of private pensions. 1982: Brookings Inst Pr.
