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Competing Theories of Financial Anomalies

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  • Alon Brav

    (Duke University)

  • J.B. Heaton

    (Bartlit Beck Herman Palenchar & Scott and Duke University)

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    Abstract

    We compare two competing theories of financial anomalies: "behavioral" theories built on investor irrationality, and "rational structural uncertainty" theories built on incomplete information about the structure of the economic environment. We find that although the theories relax opposite assumptions of the rational expectations ideal, their mathematical and predictive similarities make them difficult to distinguish. Even if irrationality generates financial anomalies, their disappearance still may hinge on rational learning--that is, on the ability of rational arbitrageurs and their investors to reject competing rational explanations for observed price patterns. Copyright 2002, Oxford University Press.

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    Bibliographic Info

    Article provided by Society for Financial Studies in its journal Review of Financial Studies.

    Volume (Year): 15 (2002)
    Issue (Month): 2 (March)
    Pages: 575-606

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    Handle: RePEc:oup:rfinst:v:15:y:2002:i:2:p:575-606

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