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Markets for information : of inefficient firewalls and efficient monopolies

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  • Antonio Cabrales

    ()

  • Piero Gottardi

    ()

Abstract

In this paper we build a formal model to study market environments where information is costly to acquire and is of use also to potential competitors. In such situations a market for information may form, where reports - of unverifiable quality - over the information acquired are sold. A complete characterization of the equilibria of the game is provided. We find that information is acquired when its costs are not too high and in that case it is also sold, though reports are typically noisy. Also, the market for information tends to be a monopoly, and there is typically inefficiency given by underinvestment in information acquisition. Regulatory interventions in the form of firewalls, limiting the access to the sale of information to third parties, uninterested in trading the underlying object, only make the inefficiency worse. On the other hand, efficiency can be attained with a monopolist selling differentiated information, provided entry is blocked. The above findings hold when information has a prevalent horizontal differentiation component. When that is not the case, and the vertical differentiation element is more important, firewalls can in fact be beneficial.

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Bibliographic Info

Paper provided by Universidad Carlos III, Departamento de Economía in its series Economics Working Papers with number we080201.

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Date of creation: Jan 2008
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Handle: RePEc:cte:werepe:we080201

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Keywords: Information sale; Cheap talk; Conflicts of interest; Information acquisition; Chinese walls; Market efficiency;

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Cited by:
  1. Aaron S. Edlin, 1997. "Is the Corner Electronics Store Violationg the Antitrust Laws? (or Why the Good Guys Aren't)," Levine's Working Paper Archive 1009, David K. Levine.
  2. Andrea Galeotti & Sanjeev Goyal, 2007. "The Law of the Few," Economics Discussion Papers, University of Essex, Department of Economics 636, University of Essex, Department of Economics.
  3. Viola Chen, 2008. "Essays in Applied Theory," Levine's Working Paper Archive 122247000000002243, David K. Levine.

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