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Heterogeneity and the Formation of Risk-Sharing Coalitions

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  • Fabien MOIZEAU

    (University of Rennes 1 - CREM-CNRS)

  • Fernando JARAMILLO

    (Universidad del Rosario, Bogota (Colombia))

  • Hubert KEMPF

    (École Normale Supérieure de Cachan et Paris School of Economics)

Abstract

We study the relationship between the distribution of individuals' attributes over the population and the extent of risk sharing in a risky environment. We consider a society where individuals differing with respect to risk or their degree of risk aversion form risk-sharing coalitions in the absence of financial markets. We obtain a partition belonging to the core of the membership game. It is homophily-based: the less risky (or the more risk tolerant) agents congregate together and reject more risky ones (or less risk tolerant ones) into other coalitions. The distribution of risk or risk aversion affects the number and the size of these coalitions. It turns out that individuals may pay a lower risk premium in more risky societies. We also show that a higher heterogeneity in risk or risk aversion leads to a lower degree of partial risk-sharing. The empirical evidence on partial risk sharing can be understood when the endogenous partition of society into risk-sharing coalitions is taken into account.

Suggested Citation

  • Fabien MOIZEAU & Fernando JARAMILLO & Hubert KEMPF, 2011. "Heterogeneity and the Formation of Risk-Sharing Coalitions," Economics Working Paper Archive (University of Rennes 1 & University of Caen) 201111, Center for Research in Economics and Management (CREM), University of Rennes 1, University of Caen and CNRS.
  • Handle: RePEc:tut:cremwp:201111
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    Cited by:

    1. Renaud Bourlès & Juliette Rouchier, 2012. "Evolving Informal Risk-Sharing Cooperatives and Other-Regarding Preferences," Working Papers halshs-00793706, HAL.
    2. Gabrielle Demange, 2017. "The stability of group formation," Revue d'économie politique, Dalloz, vol. 127(4), pages 495-516.
    3. Li, Sanxi & Sun, Hailin & Wang, Tong & Yu, Jun, 2016. "Assortative matching and risk sharing," Journal of Economic Theory, Elsevier, vol. 163(C), pages 248-275.
    4. Gao Wayne Yuan & Moon Eunyoung, 2016. "Informal Insurance Networks," The B.E. Journal of Theoretical Economics, De Gruyter, vol. 16(2), pages 455-484, June.
    5. Hoang & Laure Pasquier-Doumer & Camille Saint-Macary, 2018. "Ethnicity and risk sharing network formation: Evidence from rural Viet Nam," Working Papers DT/2018/15, DIAL (Développement, Institutions et Mondialisation).

    More about this item

    Keywords

    Risk Sharing; Group Membership; Social Segmentation;

    JEL classification:

    • C71 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Cooperative Games
    • D3 - Microeconomics - - Distribution
    • D71 - Microeconomics - - Analysis of Collective Decision-Making - - - Social Choice; Clubs; Committees; Associations
    • D81 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Criteria for Decision-Making under Risk and Uncertainty

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