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Multiplicity in General Financial Equilibrium with Portfolio Constraints, Second Version

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Author Info
Suleyman Basak () (London Business School and CEPR, Institute of Finance and Accounting)
David Cass () (Department of Economics, University of Pennsylvania)
Juan Manuel Licari () (Department of Economics, University of Pennsylvania)
Anna Pavlova () (London Business School and CEPR, Institute of Finance and Accounting)

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Abstract

This paper explores the role of portfolio constraints in generating multiplicity of equilibrium. We present a simple financial market economy with two goods and two households, households who face constraints on their ability to take unbounded positions in risky stocks. Absent such constraints, equilibrium allocation is unique and is Pareto efficient. With one portfolio constraint in place, the efficient equilibrium is still possible; however, additional inefficient equilibria in which the constraint is binding may emerge. We show further that with portfolio constraints cum incomplete markets, there may be a continuum of equilibria; adding incomplete markets may lead to real indeterminacy.

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Publisher Info
Paper provided by Penn Institute for Economic Research, Department of Economics, University of Pennsylvania in its series PIER Working Paper Archive with number 06-020.

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Length: 36 pages
Date of creation: 01 Mar 2006
Date of revision: 17 Jul 2006
Handle: RePEc:pen:papers:06-020

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Related research
Keywords: Multiple equilibria; asset pricing; portfolio constraints; indeterminacy; financial equilibrium;

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Find related papers by JEL classification:
G12 - Financial Economics - - General Financial Markets - - - Asset Pricing
D52 - Microeconomics - - General Equilibrium and Disequilibrium - - - Incomplete Markets

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  1. Basak, Suleyman & Cuoco, Domenico, 1998. "An Equilibrium Model with Restricted Stock Market Participation," Review of Financial Studies, Oxford University Press for Society for Financial Studies, vol. 11(2), pages 309-41.
  2. Jérôme Detemple & Angel Serrat, 2003. "Dynamic Equilibrium with Liquidity Constraints," Review of Financial Studies, Oxford University Press for Society for Financial Studies, vol. 16(2), pages 597-629. [Downloadable!] (restricted)
  3. Jérôme B. Detemple & Shashidhar Murthy, 1997. "Equilibrium Asset Prices and No-Arbitrage with Portfolio Constraints," CIRANO Working Papers 97s-12, CIRANO. [Downloadable!]
  4. Gennotte, Gerard & Leland, Hayne, 1990. "Market Liquidity, Hedging, and Crashes," American Economic Review, American Economic Association, vol. 80(5), pages 999-1021, December. [Downloadable!] (restricted)
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  5. Duffie, Darrell & Shafer, Wayne, 1985. "Equilibrium in incomplete markets: I : A basic model of generic existence," Journal of Mathematical Economics, Elsevier, vol. 14(3), pages 285-300, June. [Downloadable!] (restricted)
  6. Cass, David & Siconolfi, Paolo & Villanacci, Antonio, 2001. "Generic regularity of competitive equilibria with restricted participation," Journal of Mathematical Economics, Elsevier, vol. 36(1), pages 61-76, September. [Downloadable!] (restricted)
  7. Harrison Hong & Jeremy C. Stein, 2003. "Differences of Opinion, Short-Sales Constraints, and Market Crashes," Review of Financial Studies, Oxford University Press for Society for Financial Studies, vol. 16(2), pages 487-525. [Downloadable!] (restricted)
  8. Peter M. Demarzo & Ron Kaniel & Ilan Kremer, 2004. "Diversification as a Public Good: Community Effects in Portfolio Choice," Journal of Finance, American Finance Association, vol. 59(4), pages 1677-1716, 08. [Downloadable!] (restricted)
  9. Lucas, Robert E, Jr, 1978. "Asset Prices in an Exchange Economy," Econometrica, Econometric Society, vol. 46(6), pages 1429-45, November. [Downloadable!] (restricted)
  10. Detemple, Jerome & Murthy, Shashidhar, 1997. "Equilibrium Asset Prices and No-Arbitrage with Portfolio Constraints," Review of Financial Studies, Oxford University Press for Society for Financial Studies, vol. 10(4), pages 1133-74.
  11. Cass, David & Pavlova, Anna, 2004. "On trees and logs," Journal of Economic Theory, Elsevier, vol. 116(1), pages 41-83, May. [Downloadable!] (restricted)
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  12. Anna Pavlova & Roberto Rigobon, 2005. "Wealth Transfers, Contagion, and Portfolio Constraints," NBER Working Papers 11440, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
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  13. Geanakoplos, J. & Magill, M. & Quinzii, M. & Dreze, J., 1990. "Generic inefficiency of stock market equilibrium when markets are incomplete," Journal of Mathematical Economics, Elsevier, vol. 19(1-2), pages 113-151. [Downloadable!] (restricted)
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  14. Barlevy, Gadi & Veronesi, Pietro, 2003. "Rational panics and stock market crashes," Journal of Economic Theory, Elsevier, vol. 110(2), pages 234-263, June. [Downloadable!] (restricted)
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