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Intergenerational Risksharing and Equilibrium Asset Prices

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  • John Y. Campbell
  • Yves Nosbusch

Abstract

In the presence of overlapping generations, markets are incomplete because it is impossible to engage in risksharing trades with the unborn. In such an environment the government can use a social security system, with contingent taxes and benefits, to improve risksharing across generations. An interesting question is how the form of the social security system affects asset prices in equilibrium. In this paper we set up a simple model with two risky factors of production: human capital, owned by the young, and physical capital, owned by all older generations. We show that a social security system that optimally shares risks across generations exposes future generations to a share of the risk in physical capital returns. Such a system reduces precautionary saving and increases the risk-bearing capacity of the economy. Under plausible conditions it increases the riskless interest rate, lowers the price of physical capital, and reduces the risk premium on physical capital.

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Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 12204.

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Date of creation: May 2006
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Publication status: published as Campbell, John Y. & Nosbusch, Yves, 2007. "Intergenerational risksharing and equilibrium asset prices," Journal of Monetary Economics, Elsevier, vol. 54(8), pages 2251-2268, November.
Handle: RePEc:nbr:nberwo:12204

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  1. Laurence Ball & N. Gregory Mankiw, 2007. "Intergenerational Risk Sharing in the Spirit of Arrow, Debreu, and Rawls, with Applications to Social Security Design," Journal of Political Economy, University of Chicago Press, vol. 115(4), pages 523-547, 08.
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Cited by:
  1. Nosbusch, Yves & Campbell, John, 2007. "Intergenerational Risksharing and Equilibrium Asset Prices," Scholarly Articles 3196340, Harvard University Department of Economics.
  2. Andrew Glover & Jonathan Heathcote & Dirk Krueger & José-Víctor Ríos-Rull, 2011. "Intergenerational Redistribution in the Great Recession," NBER Working Papers 16924, National Bureau of Economic Research, Inc.
  3. Beetsma, Roel M.W.J. & Bovenberg, A. Lans & Romp, Ward E., 2011. "Funded pensions and intergenerational and international risk sharing in general equilibrium," Journal of International Money and Finance, Elsevier, vol. 30(7), pages 1516-1534.
  4. Guibaud, Stéphane & Nosbusch, Yves & Vayanos, Dimitri, 2013. "Bond Market Clienteles, the Yield Curve, and the Optimal Maturity Structure of Government Debt," CEPR Discussion Papers 9407, C.E.P.R. Discussion Papers.
  5. Luciano Greco, 2008. "A Note on Social Security and Public Debt," "Marco Fanno" Working Papers 0083, Dipartimento di Scienze Economiche "Marco Fanno".
  6. Devis Geron, 2009. "Social Security Incidence under Uncertainty Assessing Italian Reforms," CESifo Working Paper Series 2812, CESifo Group Munich.
  7. Carlsson, Evert & Erlandzon, Karl, 2006. "The Bright Side of Shiller-Swaps: A Solution to Inter-generational Risk-sharing," Working Papers in Economics 233, University of Gothenburg, Department of Economics, revised 24 Oct 2006.

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