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Value of Information in Competitive Economies with Incomplete Markets

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  • Piero Gottardi

    ()

  • Rohit Rahi

    ()

Abstract

We study the value of information in a competitive economy in which agents trade in asset markets to reallocate risk. We characterize the kinds of information that allow a welfare improvement when portfolios can be freely reallocated. We then compare competitive equilibria before and after a change in information. We show that generically, if markets are sufficiently incomplete, the welfare effects are completely arbitrary: there typically exist changes in information that make all agents better off or all agents worse off.

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File URL: http://www.lse.ac.uk/fmg/workingPapers/discussionPapers/DP658_2010_ValueofInformationinCompetitiveEconomieswithIncompleteMarkets.pdf
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Bibliographic Info

Paper provided by Financial Markets Group in its series FMG Discussion Papers with number dp658.

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Date of creation: Aug 2010
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Handle: RePEc:fmg:fmgdps:dp658

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  1. Holmstrom, Bengt & Myerson, Roger B, 1983. "Efficient and Durable Decision Rules with Incomplete Information," Econometrica, Econometric Society, vol. 51(6), pages 1799-819, November.
  2. Hirshleifer, Jack, 1971. "The Private and Social Value of Information and the Reward to Inventive Activity," American Economic Review, American Economic Association, vol. 61(4), pages 561-74, September.
  3. Gottardi, Piero & Rahi, Rohit, 2001. "Efficiency Properties of Rational Expectations Equilibria with Asymmetric Information," CEPR Discussion Papers 2922, C.E.P.R. Discussion Papers.
  4. David Cass & Alessandro Citanna, 1998. "Pareto improving financial innovation in incomplete markets," Economic Theory, Springer, vol. 11(3), pages 467-494.
  5. Alessandro Citanna & Antonio Villanacci, . "Incomplete markets, allocative efficiency and the information revealed by prices," GSIA Working Papers 10, Carnegie Mellon University, Tepper School of Business.
  6. Green, Jerry R, 1981. "Value of Information with Sequential Futures Markets," Econometrica, Econometric Society, vol. 49(2), pages 335-58, March.
  7. 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.
  8. Greenwald, Bruce C & Stiglitz, Joseph E, 1986. "Externalities in Economies with Imperfect Information and Incomplete Markets," The Quarterly Journal of Economics, MIT Press, vol. 101(2), pages 229-64, May.
  9. Hakansson, Nils H & Kunkel, J Gregory & Ohlson, James A, 1982. " Sufficient and Necessary Conditions for Information to Have Social Value in Pure Exchange," Journal of Finance, American Finance Association, vol. 37(5), pages 1169-81, December.
  10. Atsushi Kajii & Antonio Villanacci & Alessandro Citanna, 1998. "Constrained suboptimality in incomplete markets: a general approach and two applications," Economic Theory, Springer, vol. 11(3), pages 495-521.
  11. Milne, Frank & Shefrin, H. M., 1987. "Information and securities: A note on pareto dominance and the second best," Journal of Economic Theory, Elsevier, vol. 43(2), pages 314-328, December.
  12. Colin M. Campbell, 2002. "Blackwell's Ordering and Public Information," Departmental Working Papers 200206, Rutgers University, Department of Economics.
  13. Eckwert, Bernhard & Zilcha, Itzhak, 2001. "The Value of Information in Production Economies," Journal of Economic Theory, Elsevier, vol. 100(1), pages 172-186, September.
  14. Cass, David & Shell, Karl, 1983. "Do Sunspots Matter?," Journal of Political Economy, University of Chicago Press, vol. 91(2), pages 193-227, April.
  15. Edward E. Schlee, 2001. "The Value of Information in Efficient Risk-Sharing Arrangements," American Economic Review, American Economic Association, vol. 91(3), pages 509-524, June.
  16. Michael Magill & Martine Quinzii, 2002. "Theory of Incomplete Markets, Volume 1," MIT Press Books, The MIT Press, edition 1, volume 1, number 0262632543, December.
  17. Lawrence Blume & Tarek Coury & David Easley, 2006. "Information, trade and incomplete markets," Economic Theory, Springer, vol. 29(2), pages 379-394, October.
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Cited by:
  1. Piero Gottardi & Rohit Rahi, 2012. "Risk-Sharing and Retrading in Incomplete Markets," Economics Working Papers ECO2012/03, European University Institute.

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