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Refinements and incentive efficiency in Walrasian models of insurance economies

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  • Citanna, Alessandro
  • Siconolfi, Paolo

Abstract

The literature on Walrasian markets in large economies with adverse selection has used various equilibrium refinements, but has obtained no general incentive efficiency of equilibrium, namely when cross-subsidies are needed for efficiency. We show that the same refined equilibria may also be incentive inefficient even when general mechanisms that allow for such cross-subsidies are priced and can be traded. In the process, we also prove existence of some type of forward induction equilibria in this context.

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  • Citanna, Alessandro & Siconolfi, Paolo, 2014. "Refinements and incentive efficiency in Walrasian models of insurance economies," Journal of Mathematical Economics, Elsevier, vol. 50(C), pages 208-218.
    • Handle: RePEc:eee:mateco:v:50:y:2014:i:c:p:208-218
    DOI: 10.1016/j.jmateco.2013.12.007
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    1. Alessandro Citanna & Paolo Siconolfi, 2016. "Incentive Efficient Price Systems In Large Insurance Economies With Adverse Selection," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 57(3), pages 1027-1056, August.

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