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

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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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Cited by:
  1. Thomas Baudin, 2008. "Family policies : what does the standard endogenous fertility model tell us ?," Université Paris1 Panthéon-Sorbonne (Post-Print and Working Papers) halshs-00275751, HAL.
  2. Alice Schoonbroodt & Michèle Tertilt, 2010. "Who Owns Children and Does it Matter?," NBER Working Papers 15663, National Bureau of Economic Research, Inc.
  3. Yasuoka, Masaya & Miyake, Atsushi, 2013. "Public debt, child allowances and pension benefits with endogenous fertility," Economics - The Open-Access, Open-Assessment E-Journal, Kiel Institute for the World Economy, vol. 7(11), pages 1-25.
  4. Richard C. Barnett & Joydeep Bhattacharya & Mikko Puhakka, 2012. "Private versus Public Old-Age Security," DEGIT Conference Papers c017_043, DEGIT, Dynamics, Economic Growth, and International Trade.
  5. Schoonbroodt, Alice & Tertilt, Michèle, 2014. "Property rights and efficiency in OLG models with endogenous fertility," Journal of Economic Theory, Elsevier, vol. 150(C), pages 551-582.
  6. Yew, Siew Ling & Zhang, Jie, 2009. "Optimal social security in a dynastic model with human capital externalities, fertility and endogenous growth," Journal of Public Economics, Elsevier, vol. 93(3-4), pages 605-619, April.
  7. Yew, Siew Ling & Zhang, Jie, 2013. "Socially optimal social security and education subsidization in a dynastic model with human capital externalities, fertility and endogenous growth," Journal of Economic Dynamics and Control, Elsevier, vol. 37(1), pages 154-175.
  8. Akira Momota & Ryo Horii, 2013. "Timing of childbirth, capital accumulation, and economic welfare," Oxford Economic Papers, Oxford University Press, vol. 65(2), pages 494-522, April.
  9. Thomas Baudin, 2008. "Family policies : what does the standard endogenous fertility model tell us ?," Post-Print halshs-00275751, HAL.

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