Bertrand and Walras Equilibria Under Moral Hazard
AbstractWe consider a simple model of competition under moral hazard with constant return technologies. We consider preferences that are not separable in effort: marginal utility of income is assumed to increase with leisure, especially for high income levels. We show that, in this context, Bertrand competition may result in positive equilibrium profit. This result holds for purely idiosyncratic shocks when only deterministic contracts are considered and extends to unrestricted contract spaces in the presence of aggregate uncertainty. Finally, these findings have important consequences on the definition of an equilibrium. We show that, in this context, a Walrasian general equilibrium ï¿½ la Prescott-Townsend may fail to exist: any "equilibrium" must involve rationing.
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Date of creation: 30 Apr 2003
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Other versions of this item:
- Alberto Bennardo & P.A. Chiappori, 2002. "Bertrand and Walras equilibria under moral hazard," CSEF Working Papers 87, Centre for Studies in Economics and Finance (CSEF), University of Naples, Italy.
- Bennardo, Alberto & Chiappori, Pierre-André, 2002. "Bertrand and Walras Equilibria Under Moral Hazard," CEPR Discussion Papers 3650, C.E.P.R. Discussion Papers.
- D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information; Mechanism Design
This paper has been announced in the following NEP Reports:
- NEP-ALL-2004-05-02 (All new papers)
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