1. O.Attanasio, and G.Violante, "The Demographic Transition in Closed and Open Economy: A Tale of Two Regions ," Working Paper No. 412, Research Department, Inter-American Development Bank, Washington, 2000 .
2. A. J.Auerbach, L. J.Kotlikoff, R. P.Hagemann, and G.Nicoletti, "The Economic Dynamics of an Ageing Population: The Case of Four OECD Countries ," Working Paper No. 62, Department of Economics and Statistics, OECD, Paris, 1989 .
3. F. C.Bell, A. H.Wade, and S. C.Goss, "Life Tables for the United States Social Security Area 1900-2080 ," Actuarial Study No. 107, U.S. Department of Health and Human Services, 1992 .