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Prices and Portfolio Choices in Financial Markets: Theory, Econometrics, Experiments

Author

Listed:
  • Peter Bossaerts

    (California Institute of Technology Centre for Economic Policy Research and Swiss Finance Institute)

  • Charles Plott

    (California Institute of Technology)

  • William R. Zame

    (UCLA and California Institute of Technology)

Abstract

Many tests of asset pricing models address only the pricing predictions — but these pricing predictions rest on portfolio choice predictions which seem obviously wrong. This paper suggests a new approach to asset pricing and portfolio choices, based on unobserved heterogeneity. This approach yields the standard pricing conclusions of classical models but is consistent with very different portfolio choices. Novel econometric tests link the price and portfolio predictions and take account of the general equilibrium effects of sample-size bias. The paper works through the approach in detail for the case of the classical CAPM, producing a model called CAPM+€. When these econometric tests are applied to data generated by large-scale laboratory asset markets which reveal both prices and portfolio choices, CAPM+€ is not rejected.

Suggested Citation

  • Peter Bossaerts & Charles Plott & William R. Zame, 2007. "Prices and Portfolio Choices in Financial Markets: Theory, Econometrics, Experiments," Swiss Finance Institute Research Paper Series 07-05, Swiss Finance Institute.
    • Handle: RePEc:chf:rpseri:rp0705
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    Keywords

    experimental finance; experimental asset markets; risk aversion;
    All these keywords.

    JEL classification:

    • C91 - Mathematical and Quantitative Methods - - Design of Experiments - - - Laboratory, Individual Behavior
    • C92 - Mathematical and Quantitative Methods - - Design of Experiments - - - Laboratory, Group Behavior
    • D51 - Microeconomics - - General Equilibrium and Disequilibrium - - - Exchange and Production Economies
    • G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
    • G12 - Financial Economics - - General Financial Markets - - - Asset Pricing; Trading Volume; Bond Interest Rates

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