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Sharing aggregate risks under moral hazard

Author

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  • Gabrielle Demange

    (PSE - Paris School of Economics - UP1 - Université Paris 1 Panthéon-Sorbonne - ENS-PSL - École normale supérieure - Paris - PSL - Université Paris Sciences et Lettres - EHESS - École des hautes études en sciences sociales - ENPC - École des Ponts ParisTech - CNRS - Centre National de la Recherche Scientifique - INRAE - Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement, PJSE - Paris-Jourdan Sciences Economiques - ENS-PSL - École normale supérieure - Paris - PSL - Université Paris Sciences et Lettres - EHESS - École des hautes études en sciences sociales - ENPC - École des Ponts ParisTech - CNRS - Centre National de la Recherche Scientifique)

Abstract

This paper analyzes the efficient design of insurance schemes in the presence of aggregate shocks and moral hazard. The population is divided into groups, the labour force in different sectors for instance. In each group, individuals are ex ante identical but are subject to idiosyncratic shocks. Without moral hazard, optimality requires (1) full insurance against idiosyncratic shocks, which gives rise to a representative agent for each group and (2) optimal sharing of macro-economic risks between these representative agents. The paper investigates what remains of this analysis when the presence of moral hazard conflicts with the full insurance of idiosyncratic shocks. In particular, how is the sharing of macro-economic risks across groups affected by the partial insurance against idiosyncratic risks? The design of unemployment insurance schemes in different economic sectors, and the design of pension annuities in an unfunded social security system are two potential applications.

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  • Gabrielle Demange, 2008. "Sharing aggregate risks under moral hazard," Working Papers halshs-00586739, HAL.
    • Handle: RePEc:hal:wpaper:halshs-00586739
    Note: View the original document on HAL open archive server: https://shs.hal.science/halshs-00586739
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    References listed on IDEAS

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    Cited by:

    1. Florian Scheuer, 2013. "Optimal Asset Taxes in Financial Markets with Aggregate Uncertainty," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 16(3), pages 405-420, July.
    2. Mohamed Belhaj & Renaud Bourl?s & Fr?d?ric Dero?an, 2014. "Risk-Taking and Risk-Sharing Incentives under Moral Hazard," American Economic Journal: Microeconomics, American Economic Association, vol. 6(1), pages 58-90, February.
    3. Carlos da Costa & Vitor Farinha Luz, 2018. "The Private Memory of Aggregate Uncertainty," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 27, pages 169-183, January.
    4. Olivier Bos & Béatrice Roussillon & Paul Schweinzer, 2016. "Agreeing on Efficient Emissions Reduction," Scandinavian Journal of Economics, Wiley Blackwell, vol. 118(4), pages 785-815, October.
    5. Vitor F. Luz & Carlos E. da Costa, 2011. "Separability and Memory: Micro Causes, Macro Consequences," 2011 Meeting Papers 916, Society for Economic Dynamics.
    6. Bos, O & P. Schweinzer, 2012. "Risk pooling in redistributive agreements," Discussion Papers 12/17, Department of Economics, University of York.
    7. Carlos Guiné, 2014. "Global Systemically Important Insurers," EIOPA Financial Stability Report - Thematic Articles 2, EIOPA, Risks and Financial Stability Department.
    8. Costa, Carlos Eugênio da & Luz, Vitor Farinha, 2010. "The private memory of aggregate shocks," FGV EPGE Economics Working Papers (Ensaios Economicos da EPGE) 706, EPGE Brazilian School of Economics and Finance - FGV EPGE (Brazil).

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