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A Mechanism-Design Approach to Speculative Trade

  • Eliaz, Kfir
  • Spiegler, Ran

When agents hold non-common priors over an unverifiable state of nature which affects the outcome of their future actions, they have an incentive to bet on the outcome. We pose the following question: what are the limits on the agents' ability to realize gains from speculative bets when their prior belief is private information? We apply a 'mechanism design' approach to this question, in the context of a pair of models: a principal-agent model in which the two parties bet on the agent's future action, and a market model in which traders bet on the future price. We characterize interim-efficient bets in these environments, and their implementability as a function of fundamentals. In general, implementability of interim-efficient bets diminishes as the costs of manipulating the bet's outcome become more uneven across states or agents.

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Paper provided by C.E.P.R. Discussion Papers in its series CEPR Discussion Papers with number 5434.

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Date of creation: Dec 2005
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Handle: RePEc:cpr:ceprdp:5434
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  1. Kfir Eliaz & Rani Spiegler, 2005. "Speculative Contracts," Levine's Bibliography 784828000000000628, UCLA Department of Economics.
  2. Jeffrey C. Ely & Kim-Sau Chung, 2004. "Foundations of Dominant Strategy Mechanisms," Econometric Society 2004 North American Summer Meetings 169, Econometric Society.
  3. Myerson, Roger B. & Satterthwaite, Mark A., 1983. "Efficient mechanisms for bilateral trading," Journal of Economic Theory, Elsevier, vol. 29(2), pages 265-281, April.
  4. Kfir Eliaz & Ran Spiegler, 2004. "Contracting with Diversely Naïve Agents," Levine's Bibliography 122247000000000530, UCLA Department of Economics.
  5. Peter Cramton & Robert Gibbons & Paul Klemperer, 1985. "Dissolving a Partnership Efficiently," Working papers 406, Massachusetts Institute of Technology (MIT), Department of Economics.
  6. Muhamet Yildiz, 2005. "Wishful Thinking in Strategic Environments," NajEcon Working Paper Reviews 666156000000000598, www.najecon.org.
  7. Paul Milgrom & Nancy L.Stokey, 1979. "Information, Trade, and Common Knowledge," Discussion Papers 377R, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
  8. Morris, Stephen, 1994. "Trade with Heterogeneous Prior Beliefs and Asymmetric Information," Econometrica, Econometric Society, vol. 62(6), pages 1327-47, November.
  9. Allaz Blaise & Vila Jean-Luc, 1993. "Cournot Competition, Forward Markets and Efficiency," Journal of Economic Theory, Elsevier, vol. 59(1), pages 1-16, February.
  10. Dubey, Pradeep, 1982. "Price-Quantity Strategic Market Games," Econometrica, Econometric Society, vol. 50(1), pages 111-26, January.
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