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Optimal social security in a dynastic model with investment externalities and endogenous fertility

This paper studies optimal pay-as-you-go social security with positive bequests and endogenous fertility. With an investment externality, a competitive solution without social security su?ers from under-investment in capital and over-reproduction of population. We show that social security can improve welfare by reducing fertility and increasing capital intensity. We also illustrate numerically that a small degree of this externality is enough to justify the observed high ratios of social security spending to GDP.

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Paper provided by School of Economics, University of Queensland, Australia in its series MRG Discussion Paper Series with number 1006.

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Handle: RePEc:qld:uqmrg6:10
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  12. Paul M Romer, 1999. "Increasing Returns and Long-Run Growth," Levine's Working Paper Archive 2232, David K. Levine.
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  16. Laitner, John & Juster, F Thomas, 1996. "New Evidence on Altruism: A Study of TIAA-CREF Retirees," American Economic Review, American Economic Association, vol. 86(4), pages 893-908, September.
  17. Michael B. Devereux & David R. F. Love, 1994. "The Effects of Factor Taxation in a Two-Sector Model of Endogenous Growth," Canadian Journal of Economics, Canadian Economics Association, vol. 27(3), pages 509-36, August.
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  19. Sinn, Hans-Werner, 2000. "Why a Funded Pension System is Useful and Why It is Not Useful," Munich Reprints in Economics 19859, University of Munich, Department of Economics.
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  24. Jones, Charles I, 1995. "Time Series Tests of Endogenous Growth Models," The Quarterly Journal of Economics, MIT Press, vol. 110(2), pages 495-525, May.
  25. Kaganovich, Michael & Zilcha, Itzhak, 1999. "Education, social security, and growth," Journal of Public Economics, Elsevier, vol. 71(2), pages 289-309, February.
  26. Ehrlich, Isaac & Zhong, Jian-Guo, 1998. "Social Security and the Real Economy: An Inquiry into Some Neglected Issues," American Economic Review, American Economic Association, vol. 88(2), pages 151-57, May.
  27. Murphy, Kevin M & Welch, Finis, 1998. "Perspectives on the Social Security Crisis and Proposed Solutions," American Economic Review, American Economic Association, vol. 88(2), pages 142-50, May.
  28. Pascal Belan & Philippe Michel & Pierre Pestieau, 1998. "Pareto-Improving Social Security Reform," The Geneva Risk and Insurance Review, Palgrave Macmillan, vol. 23(2), pages 119-125, December.
  29. Eckstein, Zvi & Wolpin, Kenneth I., 1985. "Endogenous fertility and optimal population size," Journal of Public Economics, Elsevier, vol. 27(1), pages 93-106, June.
  30. Hansson, Ingemar & Stuart, Charles, 1989. "Social Security as Trade among Living Generations," American Economic Review, American Economic Association, vol. 79(5), pages 1182-95, December.
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