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Market Power, Survival and Accuracy of Predictions in Financial Markets

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Author Info
Patrick Leoni
Abstract

This paper aims to show that the market selection hypothesis in finance is not solely driven by the competitiveness of such markets, as was originally claimed by Alchian [1] and Friedman [4]. Within a standard intertemporal General Equilibrium framework, we allow for an agent to have enough influence on financial markets to strategically affect prices of assets traded. We then show that, as in Sandroni [15], the agent’ long-run consumption will vanish if she makes less accurate predictions than the market, and maintain her market power otherwise. We conclude that the Darwinian justification to this market selection is not the only explanation for the eventual domination of agents making the most accurate predictions. Rather, we claim that the origin of market selection, and in turn of the common prior assumption in asset pricing, is associated with the ability to foresee accurately market uncertainty.

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Paper provided by Institute for Empirical Research in Economics - IEW in its series IEW - Working Papers with number iewwp216.

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Handle: RePEc:zur:iewwpx:216

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Related research
Keywords: market imperfection; asset pricing; learning;

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Find related papers by JEL classification:
G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
G12 - Financial Economics - - General Financial Markets - - - Asset Pricing
D43 - Microeconomics - - Market Structure and Pricing - - - Oligopoly and Other Forms of Market Imperfection

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References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
  1. Blume, Lawrence & Easley, David, 1992. "Evolution and market behavior," Journal of Economic Theory, Elsevier, vol. 58(1), pages 9-40, October. [Downloadable!] (restricted)
  2. Hart, Oliver D, 1979. "Monopolistic Competition in a Large Economy with Differentiated Commodities," Review of Economic Studies, Blackwell Publishing, vol. 46(1), pages 1-30, January. [Downloadable!] (restricted)
  3. Hellwig, Martin F., 1980. "On the aggregation of information in competitive markets," Journal of Economic Theory, Elsevier, vol. 22(3), pages 477-498, June. [Downloadable!] (restricted)
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(explanations, Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.)

  1. Patrick Leoni, . "Learning in Repeated Games without Repeating the Game," IEW - Working Papers iewwp215, Institute for Empirical Research in Economics - IEW. [Downloadable!]
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This page was last updated on 2009-12-3.


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