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Value of Information in Competitive Economies with Incomplete Markets

  • Piero Gottardi
  • Rohit Rahi

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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Paper provided by European University Institute in its series Economics Working Papers with number ECO2010/34.

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Date of creation: 2010
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Handle: RePEc:eui:euiwps:eco2010/34
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  1. Citanna, Alessandro & Villanacci, Antonio, 2000. "Incomplete Markets, Allocative Efficiency, and the Information Revealed by Prices," Journal of Economic Theory, Elsevier, vol. 90(2), pages 222-253, February.
  2. Nils H. Hakansson & J. Gregory Kunkel & James A. Ohlson., 1981. "Sufficient and Necessary Conditions for Information to Have Social Value in Pure Exchange," Research Program in Finance Working Papers 122, University of California at Berkeley.
  3. 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.
  4. Michael Magill & Martine Quinzii, 2002. "Theory of Incomplete Markets, Volume 1," MIT Press Books, The MIT Press, edition 1, volume 1, number 0262632543, June.
  5. Holmstrom, Bengt & Myerson, Roger B, 1983. "Efficient and Durable Decision Rules with Incomplete Information," Econometrica, Econometric Society, vol. 51(6), pages 1799-819, November.
  6. Cass, David & Shell, Karl, 1983. "Do Sunspots Matter?," Journal of Political Economy, University of Chicago Press, vol. 91(2), pages 193-227, April.
  7. 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.
  8. Rohit Rahi, 2000. "Efficiency Properties of Rational Expectations Equilibria with Asymmetric Information," Econometric Society World Congress 2000 Contributed Papers 1468, Econometric Society.
  9. Colin M. Campbell, 2002. "Blackwell's Ordering and Public Information," Departmental Working Papers 200206, Rutgers University, Department of Economics.
  10. Lawrence Blume & Tarek Coury & David Easley, 2006. "Information, trade and incomplete markets," Economic Theory, Springer, vol. 29(2), pages 379-394, October.
  11. 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.
  12. David Cass & Alessandro Citanna, 1998. "Pareto improving financial innovation in incomplete markets," Economic Theory, Springer, vol. 11(3), pages 467-494.
  13. 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.
  14. Eckwert, Bernhard & Zilcha, Itzhak, 2001. "The Value of Information in Production Economies," Journal of Economic Theory, Elsevier, vol. 100(1), pages 172-186, September.
  15. 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.
  16. Green, Jerry R, 1981. "Value of Information with Sequential Futures Markets," Econometrica, Econometric Society, vol. 49(2), pages 335-58, March.
  17. 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.
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