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On Optimality of Intergenerational Risk Sharing

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Author Info
Demange, G.

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Abstract

This paper studies optimality in dynamic stochastic economies with finitely lived agents. In this set up, an agent's utility level depends on the date at which it is evaluated, and on the available information at that date. A family of Pareto optimality concepts may be defined accordingly, with two polar cases, interim and ex ante optimality. Sufficient or necessary conditions for an allocation to be optimal are first obtained, extending an approach developed in riskless OLG models. When applied to an equilibrium in an economy in which land is transacted and markets are sequentially complete, these conditions emphasize the importance of short run efficiency. If markets are incomplete, whereas the standard approach cannot be used, sufficient conditions for interim optimality are provided in two period lived overlapping generations economies. They extend the efficiency properties of an equilibrium with land and the well known Samuelson interest rate condition to a constrained set up.

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Publisher Info
Paper provided by DELTA (Ecole normale supérieure) in its series DELTA Working Papers with number 2000-05.

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Length: 24 pages
Date of creation: 2000
Date of revision:
Publication status: Published in Economic Theory, 2002, 20, pp. 1-27.
Handle: RePEc:del:abcdef:2000-05

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Keywords: RISK ; UTILITY FUNCTION ; CONSUMPTION;

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Find related papers by JEL classification:
C00 - Mathematical and Quantitative Methods - - General - - - General
D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information
D10 - Microeconomics - - Household Behavior - - - General

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  2. Dirk Krueger & Felix Kubler, 2002. "Intergenerational Risk-Sharing via Social Security when Financial Markets Are Incomplete," American Economic Review, American Economic Association, vol. 92(2), pages 407-410, May. [Downloadable!]
  3. Marcello D’Amato & Vincenzo Galasso, 2008. "Political Intergenerational Risk Sharing," Working Papers 342, IGIER (Innocenzo Gasparini Institute for Economic Research), Bocconi University. [Downloadable!]
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  4. Beetsma, Roel & Bovenberg, A Lans, 2007. "Pension systems, Intergenerational Risk Sharing and Inflation," CEPR Discussion Papers 6089, C.E.P.R. Discussion Papers. [Downloadable!] (restricted)
  5. Luciano Greco, 2008. "A Note on Social Security and Public Debt," "Marco Fanno" Working Papers 0083, Dipartimento di Scienze Economiche "Marco Fanno". [Downloadable!]
  6. Georges de Menil & Eytan Sheshinski, 2004. "Planning for the Optimal Mix of Paygo Tax and Funded Savings," DELTA Working Papers 2004-15, DELTA (Ecole normale supérieure). [Downloadable!]
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  7. Piero Gottardi & Felix Kubler, 2006. "Social Security and Risk Sharing," Working Papers 2006_38, University of Venice "Ca' Foscari", Department of Economics. [Downloadable!]
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  8. Barbie, Martin & Hagedorn, Marcus & Kaul, Ashok, 2001. "Government Debt as Insurance against Macroeconomic Risk," IZA Discussion Papers 412, Institute for the Study of Labor (IZA). [Downloadable!]
  9. Espen Henriksen & Steve Spear, 2006. "Dynamic Suboptimality of Competitive Equilibrium in Multiperiod Overlapping Generations Economies," Computing in Economics and Finance 2006 223, Society for Computational Economics. [Downloadable!]
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  10. Alexander Ludwig & Michael Reiter, 2008. "Sharing Demographic Risk – Who is Afraid of the Baby Bust?," MEA discussion paper series 08166, Mannheim Research Institute for the Economics of Aging (MEA), University of Mannheim. [Downloadable!]
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  11. Debora Kusmerski Bilard, 2008. "Optimal Sharing of Labor Productivity Risks and Mix of Pay-As-You-Go and Savings," Tinbergen Institute Discussion Papers 08-066/1, Tinbergen Institute. [Downloadable!]
  12. Dirk Krueger & Felix Kubler, 2006. "Pareto-Improving Social Security Reform when Financial Markets are Incomplete!?," American Economic Review, American Economic Association, vol. 96(3), pages 737-755, June. [Downloadable!]
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  13. Demange, Gabrielle, 2005. "On Sustainable Pay-As-You-Go Systems," CEPR Discussion Papers 4966, C.E.P.R. Discussion Papers. [Downloadable!] (restricted)
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  14. Subir Chattopadhyay, 2001. "Long-Lived Assets, Incomplete Markets, And Optimality," Working Papers. Serie AD 2001-10, Instituto Valenciano de Investigaciones Económicas, S.A. (Ivie). [Downloadable!]
  15. D'Amato, Marcello & Galasso, Vincenzo, 2002. "Aggregate Risk, Political Constraints and Social Security Design," CEPR Discussion Papers 3330, C.E.P.R. Discussion Papers. [Downloadable!] (restricted)
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