A note on the convergence to competitive equilibria in economies with moral hazard
We examine the conditions under which competitive equilibria can be obtained as the limit, when the number of strategic traders gets large, of Nash equilibria in economies with asymmetric information on agents' effort and possibly imperfect observability of agents' trades. Convergence always occur when either effort is publicly observed (no matter what is the information available to intermediaries on agents' trades); or effort is private information but agents' trades are perfectly observed; or no information at all is available on agents' trades. On the other hand, when each intermediary can observe its trades with an agent, but not the agent's trades with other intermediaries, the (Nash) equilibria with strategic intermediaries do not converge to any of the competitive equilibria, for an open set of economies. The source of the difficulties for convergence is the combination of asymmetric information and the restrictions on the observability of trades which prevent the formation of exclusive contractual relationships and generate barriers to entry in the markets for contracts.
References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- Douglas Gale, 1992. "A Walrasian Theory of Markets with Adverse Selection," Review of Economic Studies, Oxford University Press, vol. 59(2), pages 229-255.
- Alberto Bisin & John Geanakoplos & Piero Gottardi & Enrico Minelli & Heracles Polemarchakis, 2009.
"Markets and Contracts,"
0915, University of Brescia, Department of Economics.
- Bisin, Alberto & Gottardi, Piero, 1999.
"Competitive Equilibria with Asymmetric Information,"
Journal of Economic Theory,
Elsevier, vol. 87(1), pages 1-48, July.
- Alberto Bisin & Piero Gottardi, 1998. "Competitive Equilibria with Asymmetric Information," Levine's Working Paper Archive 2062, David K. Levine.
- Biais, Bruno & Martimort, David & Rochet, Jean-Charles, 1998.
"Competing Mechanisms in a Commun Value Environment,"
IDEI Working Papers
75, Institut d'Économie Industrielle (IDEI), Toulouse.
- Bruno Biais & David Martimort & Jean-Charles Rochet, 2000. "Competing Mechanisms in a Common Value Environment," Econometrica, Econometric Society, vol. 68(4), pages 799-838, July.
- Pradeep Dubey & John Geanakoplos & Martin Shubik, 1988. "Default and Efficiency in a General Equilibrium Model with Incomplete Markets," Cowles Foundation Discussion Papers 879R, Cowles Foundation for Research in Economics, Yale University, revised Feb 1989.
When requesting a correction, please mention this item's handle: RePEc:upf:upfgen:381. See general information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: ()
If references are entirely missing, you can add them using this form.