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Implementation and orderings of public information

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  • Colin Campbell

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Abstract

We explore the relationship between public information and implementable outcomes in an environment characterized by random endowments and private information. We show that if public signals carry no information about private types, then an exact relationship holds: a more informative public signal structure, in the sense of Blackwell, induces a smaller set of ex-ante implementable social choice functions. This holds for a large set of implementation standards, including Nash implementation, and Bayesian incentive compatibility. The result extends the notion, dating to Hirshleifer (1971), that public information can have negative value to an endowment economy under uncertainty. Copyright Springer-Verlag Berlin/Heidelberg 2004

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File URL: http://hdl.handle.net/10.1007/s10058-004-0119-1
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Bibliographic Info

Article provided by Springer in its journal Review of Economic Design.

Volume (Year): 9 (2004)
Issue (Month): 1 (December)
Pages: 43-57

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Handle: RePEc:spr:reecde:v:9:y:2004:i:1:p:43-57

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Web page: http://link.springer.de/link/service/journals/10058/index.htm

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Related research

Keywords: Implementation; Blackwell’s ordering; information; risk sharing;

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References

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  1. Green, Jerry R, 1981. "Value of Information with Sequential Futures Markets," Econometrica, Econometric Society, vol. 49(2), pages 335-58, March.
  2. 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.
  3. Eckwert, B. & Zilcha, I., 1999. "Incomplete Risk Sharing Arrangements and the Value of Information," Papers 13-99, Tel Aviv.
  4. Colin M. Campbell, 2002. "Blackwell's Ordering and Public Information," Departmental Working Papers 200206, Rutgers University, Department of Economics.
  5. Marshall, John M, 1974. "Private Incentives and Public Information," American Economic Review, American Economic Association, vol. 64(3), pages 373-90, June.
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