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

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Author Info
Zeng, J
Jie Zhang () (MRG - School of Economics, The University of Queensland)

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Abstract

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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  6. Zhang, Jie & Zhang, Junsen, 2003. "Long-run effects of unfunded social security with earnings-dependent benefits," Journal of Economic Dynamics and Control, Elsevier, vol. 28(3), pages 617-641, December. [Downloadable!] (restricted)
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    • Feldstein, Martin & Liebman, Jeffrey B., 2002. "Social security," Handbook of Public Economics, in: A. J. Auerbach & M. Feldstein (ed.), Handbook of Public Economics, edition 1, volume 4, chapter 32, pages 2245-2324 Elsevier. [Downloadable!] (restricted)
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  19. 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. [Downloadable!] (restricted)
  20. 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. [Downloadable!] (restricted)
  21. Zhang, Junsen & Zhang, Jie & Lee, Ronald, 2001. "Mortality decline and long-run economic growth," Journal of Public Economics, Elsevier, vol. 80(3), pages 485-507, June. [Downloadable!] (restricted)
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  23. Devarajan, Shantayanan & Danyang, Xie & Zou, Heng-fu, 1998. "Should public capital be subsidized or provided?," Journal of Monetary Economics, Elsevier, vol. 41(2), pages 319-331, April. [Downloadable!] (restricted)
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  24. Zhang, Jie, 1995. "Social security and endogenous growth," Journal of Public Economics, Elsevier, vol. 58(2), pages 185-213, October. [Downloadable!] (restricted)
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