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Normative Properties Of Stock Market Equilibrium With Moral Hazard

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  • Martine Quinzii
  • Michael Magill

    (Department of Economics, University of California Davis)

Abstract

This paper presents a model of stock market equilibrium with a finite number of corporations and studies its normative properties. Each firm is run by a manager whose effort is unobservable and influences the probabilities of the firm’s outcomes. The Board of Directors of each firm chooses an incentive contract for the manager which maximizes the firm’s market value. With a finite number of firms, the equilibrium is constrained Pareto optimal only when investors are risk neutral and firms’ outcomes are independent. The inefficiencies which arise when investors are risk averse, or when firms are influenced by a common shock, are studied and it is shown that under reasonable assumptions there is under investment in effort in equilibrium. The inefficiencies exist when the firms are not completely negligible, as is typical of the large corporations with dispersed ownership traded on public exchanges in the US. In the idealized case where firms of each type are replicated and replaced by a continuum of firms of each type with independent outcomes, the inefficiencies disappear.

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Bibliographic Info

Paper provided by University of California, Davis, Department of Economics in its series Working Papers with number 82.

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Length: 36
Date of creation: 01 Jan 1900
Date of revision:
Handle: RePEc:cda:wpaper:08-2

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Keywords: market; economics; stock;

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References

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  1. Jewitt, Ian, 1988. "Justifying the First-Order Approach to Principal-Agent Problems," Econometrica, Econometric Society, vol. 56(5), pages 1177-90, September.
  2. Pradeep Dubey & John Geanakoplos & Martin Shubik, 2005. "Default and Punishment in General Equilibrium," Econometrica, Econometric Society, vol. 73(1), pages 1-37, 01.
  3. Michael Magill & Martine Quinzii, 2006. "Common Shocks and Relative Compensation," Annals of Finance, Springer, vol. 2(4), pages 407-420, October.
  4. Pradeep Dubey & John Geanakoplos, 2001. "Competitive Pooling: Rothschild-Stiglitz Reconsidered," Cowles Foundation Discussion Papers 1346R2, Cowles Foundation for Research in Economics, Yale University, revised Feb 2002.
  5. Bennardo, Alberto & Chiappori, Pierre-André, 2002. "Bertrand and Walras Equilibria Under Moral Hazard," CEPR Discussion Papers 3650, C.E.P.R. Discussion Papers.
  6. Edward C Prescott & Robert M Townsend, 2010. "Pareto Optima and Competitive Equilibria With Adverse Selection and Moral Hazard," Levine's Working Paper Archive 2069, David K. Levine.
  7. Rogerson, William P, 1985. "The First-Order Approach to Principal-Agent Problems," Econometrica, Econometric Society, vol. 53(6), pages 1357-67, November.
  8. Marco LiCalzi & Sandrine Spaeter, 2003. "Distributions for the first-order approach to principal-agent problems," Economic Theory, Springer, vol. 21(1), pages 167-173, 01.
  9. Mookherjee, Dilip, 1984. "Optimal Incentive Schemes with Many Agents," Review of Economic Studies, Wiley Blackwell, vol. 51(3), pages 433-46, July.
  10. Alberto Bisin & Piero Gottardi & Adriano A. Rampini, 2004. "Managerial Hedging and Portfolio Monitoring," CESifo Working Paper Series 1322, CESifo Group Munich.
  11. Viral V. Acharya & Alberto Bisin, 2009. "Managerial hedging, equity ownership, and firm value," RAND Journal of Economics, RAND Corporation, vol. 40(1), pages 47-77.
  12. Sanford Grossman & Oliver Hart, 1978. "A theory of competitive equilibrium in stock market economies," Special Studies Papers 115, Board of Governors of the Federal Reserve System (U.S.).
  13. Sanford Grossman & Oliver Hart, . "An Analysis of the Principal-Agent Problem," Rodney L. White Center for Financial Research Working Papers 15-80, Wharton School Rodney L. White Center for Financial Research.
  14. Kocherlakota, Narayana R., 1998. "The effects of moral hazard on asset prices when financial markets are complete," Journal of Monetary Economics, Elsevier, vol. 41(1), pages 39-56, February.
  15. Marcos B. Lisboa, 2001. "Moral hazard and general equilibrium in large economies," Economic Theory, Springer, vol. 18(3), pages 555-575.
  16. Magill, Michael & Quinzii, Martine, 2002. "Capital market equilibrium with moral hazard," Journal of Mathematical Economics, Elsevier, vol. 38(1-2), pages 149-190, September.
  17. Magill, Michael & Shafer, Wayne, 1991. "Incomplete markets," Handbook of Mathematical Economics, in: W. Hildenbrand & H. Sonnenschein (ed.), Handbook of Mathematical Economics, edition 1, volume 4, chapter 30, pages 1523-1614 Elsevier.
  18. Murphy, Kevin J., 1999. "Executive compensation," Handbook of Labor Economics, in: O. Ashenfelter & D. Card (ed.), Handbook of Labor Economics, edition 1, volume 3, chapter 38, pages 2485-2563 Elsevier.
  19. Prescott, Edward C & Townsend, Robert M, 1984. "General Competitive Analysis in an Economy with Private Information," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 25(1), pages 1-20, February.
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