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Competitive Markets without Commitment

  • Nick Netzer

    ()

    (Socioeconomic Institute, University of Zurich)

  • Florian Scheuer

    ()

    (Massachusetts Institute of Technology)

In the presence of a time-inconsistency problem with optimal agency contracts, we show that competitive markets implement allocations that Pareto dominate those achieved by a benevolent planner, they induce strictly more effort, and they sometimes make the commitment problem disappear entirely. In particular, we analyze a model with moral hazard and two-sided lack of commitment. After agents have chosen a hidden effort and the need to provide incentives has vanished, firms can modify their contracts and agents can switch firms. As long as the ex-post market outcome satisfies a weak notion of competitiveness and sufficiently separates individuals who choose different effort levels, the market allocation is Pareto superior to a social planner�s allocation. We construct a specific market game that naturally generates robust equilibria with these properties. In addition, we show that equilibrium contracts without commitment are identical to those with full commitment if the latter involve no cross-subsidization between individuals who choose different effort levels.

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File URL: http://www.econ.uzh.ch/static/wp_soi/wp0814.pdf
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Paper provided by Socioeconomic Institute - University of Zurich in its series SOI - Working Papers with number 0814.

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Length: 65 pages
Date of creation: Nov 2008
Date of revision:
Publication status: forthcoming in Journal of Political Economy
Handle: RePEc:soz:wpaper:0814
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  1. Mathias Dewatripont, 1989. "Renegotiation and information revelation over time: the case of optimal labor contacts," ULB Institutional Repository 2013/9573, ULB -- Universite Libre de Bruxelles.
  2. Asheim, G.B. & Nilssen, T., 1995. "Non-Discriminating Renogociation in a Competitive Insurance Market," Memorandum 03/1995, Oslo University, Department of Economics.
  3. Oliver Hart & Andrei Shleifer & Robert Vishny, 1996. "The Proper Scope of Government: Theory and an Application to Prisons," Harvard Institute of Economic Research Working Papers 1778, Harvard - Institute of Economic Research.
  4. Boadway, Robin & Marceau, Nicolas & Marchand, Maurice, 1996. "Investment in Education and the Time Inconsistency of Redistributive Tax Policy," Economica, London School of Economics and Political Science, vol. 63(250), pages 171-89, May.
  5. Dhaval Dave & Robert Kaestner, 2009. "Health insurance and ex ante moral hazard: evidence from Medicare," International Journal of Health Economics and Management, Springer, vol. 9(4), pages 367-390, December.
  6. Mathias Dewatripont, 1989. "Renegotiation and Information Revelation Over Time: The Case of Optimal Labor Contracts," The Quarterly Journal of Economics, Oxford University Press, vol. 104(3), pages 589-619.
  7. W. Henry Chiu & Edi Karni, 1998. "Endogenous Adverse Selection and Unemployment Insurance," Journal of Political Economy, University of Chicago Press, vol. 106(4), pages 806-827, August.
  8. Wilson, Charles, 1977. "A model of insurance markets with incomplete information," Journal of Economic Theory, Elsevier, vol. 16(2), pages 167-207, December.
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