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On the Observational Implications of Knightian Uncertainty

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  • Hassett, Kevin
  • Zhong, Weifeng

Abstract

We develop a model of a prediction market with ambiguity and derive testable implications of the presence of Knightian uncertainty. Our model can explain two commonly observed empirical regularities in betting markets: the tendency for longshots to win less often than odds would indicate and the tendency for favorites to win more often. Using historical data from Intrade, we further present empirical evidence that is consistent with the predicted presence of Knightian uncertainty. Our evidence also suggests that, even with information acquisition, the Knightian uncertainty of the world may be not "learnable" to the traders in prediction markets.

Suggested Citation

  • Hassett, Kevin & Zhong, Weifeng, 2017. "On the Observational Implications of Knightian Uncertainty," MPRA Paper 82998, University Library of Munich, Germany.
  • Handle: RePEc:pra:mprapa:82998
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    File URL: https://mpra.ub.uni-muenchen.de/85233/9/MPRA_paper_85233.pdf
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    References listed on IDEAS

    as
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    3. Larry G. Epstein & Martin Schneider, 2010. "Ambiguity and Asset Markets," Annual Review of Financial Economics, Annual Reviews, vol. 2(1), pages 315-346, December.
    4. Erik Snowberg & Justin Wolfers, 2010. "Explaining the Favorite-Long Shot Bias: Is it Risk-Love or Misperceptions?," Journal of Political Economy, University of Chicago Press, vol. 118(4), pages 723-746, August.
    5. Asch, Peter & Malkiel, Burton G. & Quandt, Richard E., 1982. "Racetrack betting and informed behavior," Journal of Financial Economics, Elsevier, vol. 10(2), pages 187-194, July.
    6. Larry G. Epstein & Martin Schneider, 2007. "Learning Under Ambiguity," Review of Economic Studies, Oxford University Press, vol. 74(4), pages 1275-1303.
    7. Bryan Routledge & Stanley Zin, 2009. "Model Uncertainty and Liquidity," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 12(4), pages 543-566, October.
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    11. Massimo Guidolin & Francesca Rinaldi, 2010. "A simple model of trading and pricing risky assets under ambiguity: any lessons for policy-makers?," Applied Financial Economics, Taylor & Francis Journals, vol. 20(1-2), pages 105-135.
    12. Gilboa, Itzhak & Schmeidler, David, 1989. "Maxmin expected utility with non-unique prior," Journal of Mathematical Economics, Elsevier, vol. 18(2), pages 141-153, April.
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    14. Cain, Michael & Law, David & Peel, David, 2000. "The Favourite-Longshot Bias and Market Efficiency in UK Football Betting," Scottish Journal of Political Economy, Scottish Economic Society, vol. 47(1), pages 25-36, February.
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    More about this item

    Keywords

    ambiguity; Knightian uncertainty; prediction market; maxmin preferences;

    JEL classification:

    • C53 - Mathematical and Quantitative Methods - - Econometric Modeling - - - Forecasting and Prediction Models; Simulation Methods
    • D81 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Criteria for Decision-Making under Risk and Uncertainty
    • G13 - Financial Economics - - General Financial Markets - - - Contingent Pricing; Futures Pricing

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