Markets for Information: Of Inefficient Firewalls and Efficient Monopolies
AbstractIn this paper we study, within a formal model, market environments where information is costly to acquire and is of use also to potential competitors. Agents may then sell, or buy, reports - of unverifiable quality - over the information acquired and choose the trades in the market on the basis of what they learnt. We find that, in equilibrium, 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 inefficiency given by underinvestment in information acquisition. Regulatory interventions in the form of firewalls, limiting the access to the sale of information to agents uninterested in trading the underlying object, only make the inefficiency worse. 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 the vertical differentiation element is more important firewalls can in fact be beneficial.
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Bibliographic InfoPaper provided by Department of Economics, University of Venice "Ca' Foscari" in its series Working Papers with number 2008_37.
Date of creation: 2008
Date of revision:
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Postal: Cannaregio, S. Giobbe no 873 , 30121 Venezia
Web page: http://www.unive.it/dip.economia
More information through EDIRC
Information sale; Cheap talk; Conflicts of interest; Information Acquisition; Firewalls; Market efficiency;
Other versions of this item:
- Antonio Cabrales & Piero Gottardi, 2009. "Markets for Information: Of Inefficient Firewalls and Efficient Monopolies," Economics Working Papers ECO2009/11, European University Institute.
- Antonio Cabrales & Piero Gottardi, 2008. "Markets for Information: Of Inefficient Firewalls and Efficient Monopolies," CESifo Working Paper Series 2336, CESifo Group Munich.
- Antonio Cabrales & Piero Gottardi, 2008. "Markets for information : of inefficient firewalls and efficient monopolies," Economics Working Papers we080201, Universidad Carlos III, Departamento de Economía.
- D83 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Search, Learning, and Information
- C72 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Noncooperative Games
- G14 - Financial Economics - - General Financial Markets - - - Information and Market Efficiency; Event Studies
This paper has been announced in the following NEP Reports:
- NEP-ALL-2008-12-01 (All new papers)
- NEP-COM-2008-12-01 (Industrial Competition)
- NEP-CTA-2008-12-01 (Contract Theory & Applications)
- NEP-MIC-2008-12-01 (Microeconomics)
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.:
- Benabou, R. & Laroque, G., 1992.
"Using privileged information to manipulate markets: insiders, gurus, and credibility,"
Open Access publications from University College London
http://discovery.ucl.ac.u, University College London.
- Benabou, Roland & Laroque, Guy, 1992. "Using Privileged Information to Manipulate Markets: Insiders, Gurus, and Credibility," The Quarterly Journal of Economics, MIT Press, vol. 107(3), pages 921-58, August.
- Benabou, R. & Laroque, G., 1989. "Using Privileged Information To Manipulate Markets: Insiders, Gurus, And Credibility," Working papers 513, Massachusetts Institute of Technology (MIT), Department of Economics.
- Benabou, R. & Laroque, G., 1988. "Using Privileged Information To Manipulate Markets: Insiders, Gurus And Credibility," Papers 19, Princeton, Woodrow Wilson School - Discussion Paper.
- Mehran, Hamid & Stulz, Rene M., 2007.
"The economics of conflicts of interest in financial institutions,"
Journal of Financial Economics,
Elsevier, vol. 85(2), pages 267-296, August.
- Hamid Mehran & Rene M. Stulz, 2006. "The Economics of Conflicts of Interest in Financial Institutions," NBER Working Papers 12695, National Bureau of Economic Research, Inc.
- Mehran, Hamid & Stulz, Rene M., 2006. "The Economics of Conflicts of Interest in Financial Institutions," Working Paper Series 2006-21, Ohio State University, Charles A. Dice Center for Research in Financial Economics.
- Womack, Kent L, 1996. " Do Brokerage Analysts' Recommendations Have Investment Value?," Journal of Finance, American Finance Association, vol. 51(1), pages 137-67, March.
- Crawford, Vincent P & Sobel, Joel, 1982.
"Strategic Information Transmission,"
Econometric Society, vol. 50(6), pages 1431-51, November.
- Berry, Steven T, 1992. "Estimation of a Model of Entry in the Airline Industry," Econometrica, Econometric Society, vol. 60(4), pages 889-917, July.
- Xavier Vives, 2001. "Oligopoly Pricing: Old Ideas and New Tools," MIT Press Books, The MIT Press, edition 1, volume 1, number 026272040x, June.
- Admati, Anat R & Pfleiderer, Paul, 1990. "Direct and Indirect Sale of Information," Econometrica, Econometric Society, vol. 58(4), pages 901-28, July.
- Ericson, Richard & Pakes, Ariel, 1995. "Markov-Perfect Industry Dynamics: A Framework for Empirical Work," Review of Economic Studies, Wiley Blackwell, vol. 62(1), pages 53-82, January.
- Fishman M. J. & Hagerty K. M., 1995. "The Incentive to Sell Financial Market Information," Journal of Financial Intermediation, Elsevier, vol. 4(2), pages 95-115, April.
- Navin Kartik, 2008.
"Strategic Communication with Lying Costs,"
2008 Meeting Papers
350, Society for Economic Dynamics.
- Allen, Franklin, 1990. "The market for information and the origin of financial intermediation," Journal of Financial Intermediation, Elsevier, vol. 1(1), pages 3-30, March.
- Narasimhan Jegadeesh & Joonghyuk Kim & Susan D. Krische & Charles M. C. Lee, 2004. "Analyzing the Analysts: When Do Recommendations Add Value?," Journal of Finance, American Finance Association, vol. 59(3), pages 1083-1124, 06.
- Marco Ottaviani & Peter Norman Sorensen, 2006.
"Reputational Cheap Talk,"
RAND Journal of Economics,
The RAND Corporation, vol. 37(1), pages 155-175, Spring.
- Morgan, J. & Stocken, P., 1998.
"An Analysis of Stock Recommendations,"
204, Princeton, Woodrow Wilson School - Public and International Affairs.
- Admati, Anat R. & Pfleiderer, Paul, 1986. "A monopolistic market for information," Journal of Economic Theory, Elsevier, vol. 39(2), pages 400-438, August.
- Michaely, Roni & Womack, Kent L, 1999. "Conflict of Interest and the Credibility of Underwriter Analyst Recommendations," Review of Financial Studies, Society for Financial Studies, vol. 12(4), pages 653-86.
- Bolton, Patrick & Freixas, Xavier & Shapiro, Joel, 2007. "Conflicts of interest, information provision, and competition in the financial services industry," Journal of Financial Economics, Elsevier, vol. 85(2), pages 297-330, August.
- Brad Barber, 2001. "Can Investors Profit from the Prophets? Security Analyst Recommendations and Stock Returns," Journal of Finance, American Finance Association, vol. 56(2), pages 531-563, 04.
- Kartik, Navin & Ottaviani, Marco & Squintani, Francesco, 2007. "Credulity, lies, and costly talk," Journal of Economic Theory, Elsevier, vol. 134(1), pages 93-116, May.
- Admati, Anat R & Pfleiderer, Paul, 1988. "Selling and Trading on Information in Financial Markets," American Economic Review, American Economic Association, vol. 78(2), pages 96-103, May.
- Andrea Galeotti & Sanjeev Goyal, 2007. "The Law of the Few," Economics Discussion Papers 636, University of Essex, Department of Economics.
- Viola Chen, 2008. "Essays in Applied Theory," Levine's Working Paper Archive 122247000000002243, David K. Levine.
- 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.
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