Heterogeneous Beliefs and Prediction Market Accuracy
We consider a prediction market in which traders have heterogeneous prior beliefs in probabilities. In the two-state case, we derive necessary and sufficient conditions so that the prediction market is accurate in the sense that the equilibrium state price equals the mean probabilities of traders' beliefs. We also provide a necessary and sufficient condition for the well documented favorite-longshot bias. In an extension to many states, we revisit the results of Varian (1985) on the relationship between equilibrium state price and belief heterogeneity.
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- Hong, Harrison & Stein, Jeremy, 2007.
"Disagreement and the Stock Market,"
2894690, Harvard University Department of Economics.
- Christian Gollier, 2007. "Whom should we believe? Aggregation of heterogeneous beliefs," Journal of Risk and Uncertainty, Springer, vol. 35(2), pages 107-127, October.
- Steven Gjerstad, 2004. "Risk Aversion, Beliefs, and Prediction Market Equilibrium," Microeconomics 0411002, EconWPA.
- Miles S. Kimball, 1989.
"Precautionary Saving in the Small and in the Large,"
NBER Working Papers
2848, National Bureau of Economic Research, Inc.
- Kimball, Miles S, 1990. "Precautionary Saving in the Small and in the Large," Econometrica, Econometric Society, vol. 58(1), pages 53-73, January.
- John Fountain & Glenn Harrison, 2011. "What do prediction markets predict?," Applied Economics Letters, Taylor & Francis Journals, vol. 18(3), pages 267-272.
- Andrew B. Abel, .
"Asset Prices Under Heterogenous Beliefs: Implications for the Equity Premium,"
Rodney L. White Center for Financial Research Working Papers
9-89, Wharton School Rodney L. White Center for Financial Research.
- Andrew B. Abel, . "Asset Prices Under Heterogenous Beliefs: Implications for the Equity Premium," Rodney L. White Center for Financial Research Working Papers 09-89, Wharton School Rodney L. White Center for Financial Research.
- Forsythe, Robert & Forrest Nelson & George R. Neumann & Jack Wright, 1992. "Anatomy of an Experimental Political Stock Market," American Economic Review, American Economic Association, vol. 82(5), pages 1142-61, December.
- Ali, Mukhtar M, 1977. "Probability and Utility Estimates for Racetrack Bettors," Journal of Political Economy, University of Chicago Press, vol. 85(4), pages 803-15, August.
- Varian, Hal R, 1985. " Divergence of Opinion in Complete Markets: A Note," Journal of Finance, American Finance Association, vol. 40(1), pages 309-17, March.
- Justin Wolfers & Eric Zitzewitz, 2006.
"Interpreting Prediction Market Prices as Probabilities,"
NBER Working Papers
12200, National Bureau of Economic Research, Inc.
- Justin Wolfers & Eric Zitzewitz, 2006. "Interpreting prediction market prices as probabilities," Working Paper Series 2006-11, Federal Reserve Bank of San Francisco.
- Wolfers, Justin & Zitzewitz, Eric, 2006. "Interpreting Prediction Market Prices as Probabilities," IZA Discussion Papers 2092, Institute for the Study of Labor (IZA).
- Wolfers, Justin & Zitzewitz, Eric, 2006. "Interpreting Prediction Market Prices as Probabilities," CEPR Discussion Papers 5676, C.E.P.R. Discussion Papers.
- repec:dau:papers:123456789/80 is not listed on IDEAS
- Elyès Jouini & Clotilde Napp, 2007.
"Consensus Consumer and Intertemporal Asset Pricing with Heterogeneous Beliefs,"
Review of Economic Studies,
Oxford University Press, vol. 74(4), pages 1149-1174.
- Elyès Jouini & Clotilde Napp, 2003. "Consensus consumer and intertemporal asset pricing with heterogeneous beliefs," Finance 0312001, EconWPA.
- Clotilde Napp & Elyès Jouini, 2007. "Consensus consumer and intertemporal asset pricing with heterogeneous beliefs," Post-Print halshs-00152348, HAL.
- Peter C. Fishburn & R. Burr Porter, 1976. "Optimal Portfolios with One Safe and One Risky Asset: Effects of Changes in Rate of Return and Risk," Management Science, INFORMS, vol. 22(10), pages 1064-1073, June.
- Manski, Charles F., 2006.
"Interpreting the predictions of prediction markets,"
Elsevier, vol. 91(3), pages 425-429, June.
- Charles F. Manski, 2004. "Interpreting the Predictions of Prediction Markets," NBER Working Papers 10359, National Bureau of Economic Research, Inc.
- Jouini, E. & Napp, C., 2006.
"Aggregation of heterogeneous beliefs,"
Journal of Mathematical Economics,
Elsevier, vol. 42(6), pages 752-770, September.
- repec:dau:papers:123456789/78 is not listed on IDEAS
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