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Private Information, Strategic Behavior, and Efficiency in Cournot Markets


  • Xavier Vives


When analyzing a Cournot market with strictly convex costs dependent on a private information parameter, do we err more by ignoring market power or by ignoring the impact of incomplete information? Is the welfare loss at the market outcome driven by private information or by market power? The answer to both questions is that in large enough markets, abstracting from market power provides a much better approximation than abstracting from private information. Let n index the size of the market and the (free entry) number of firms. Then the effect of market power (private information) is of the order of 1/n (1/√n) for prices and 1/n

Suggested Citation

  • Xavier Vives, 2002. "Private Information, Strategic Behavior, and Efficiency in Cournot Markets," RAND Journal of Economics, The RAND Corporation, vol. 33(3), pages 361-376, Autumn.
  • Handle: RePEc:rje:randje:v:33:y:2002:i:autumn:p:361-376

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    References listed on IDEAS

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    1. Basso, Leonardo J. & Zhang, Anming, 2008. "On the relationship between airport pricing models," Transportation Research Part B: Methodological, Elsevier, vol. 42(9), pages 725-735, November.
    2. Kovalenkov, Alexander & Vives, Xavier, 2014. "Competitive rational expectations equilibria without apology," Journal of Economic Theory, Elsevier, vol. 149(C), pages 211-235.
    3. repec:kap:hcarem:v:21:y:2018:i:1:d:10.1007_s10729-016-9382-2 is not listed on IDEAS
    4. Garen Markarian & Juan Santalo´, 2014. "Product Market Competition, Information and Earnings Management," Journal of Business Finance & Accounting, Wiley Blackwell, vol. 41(5-6), pages 572-599, June.
    5. Ivaldi, Marc & Petrova, Milena J & Urdanoz, Miguel, 2014. "AirTicket Sales as Bids from Airline Alliances," TSE Working Papers 14-546, Toulouse School of Economics (TSE), revised 26 Jan 2015.
    6. Roy Chowdhury, Prabal & Sengupta, Kunal, 2012. "Transparency, complementarity and holdout," Games and Economic Behavior, Elsevier, vol. 75(2), pages 598-612.
    7. Dewenter, Ralf & Heimeshoff, Ulrich & Lüth, Hendrik, 2016. "The impact of the market transparency unit for fuels on gasoline prices in Germany," DICE Discussion Papers 220, University of Düsseldorf, Düsseldorf Institute for Competition Economics (DICE).
    8. Ritz, Robert, 2016. "Oligopolistic competition and welfare," Cambridge Working Papers in Economics 1680, Faculty of Economics, University of Cambridge.
    9. repec:wsi:afexxx:v:12:y:2017:i:03:n:s2010495217500142 is not listed on IDEAS
    10. Iván Major, 2006. "Why do (or do not) banks share customer information? A comparison of mature private credit markets and markets in transition," IEHAS Discussion Papers 0603, Institute of Economics, Centre for Economic and Regional Studies, Hungarian Academy of Sciences, revised 24 Apr 2006.
    11. Mariana Cunha & Paula Sarmento & Hélder Vasconcelos, 2014. "Uncertain Efficiency Gains and Merger Policy," FEP Working Papers 527, Universidade do Porto, Faculdade de Economia do Porto.
    12. Koska, Onur A. & Long, Ngo Van & Staehler, Frank, 2015. "Foreign Direct Investment as a Signal," MPRA Paper 68025, University Library of Munich, Germany.
    13. Nisvan Erkal & Daniel Piccinin, 2006. "Horizontal Mergers with Free Entry in Differentiated Oligopolies," Department of Economics - Working Papers Series 976, The University of Melbourne.
    14. Tunay I. Tunca, 2004. "Information Precision and Asymptotic Efficiency of Industrial Markets," Working Papers 04-11, NET Institute, revised Oct 2004.
    15. De Borger, Bruno & Fosgerau, Mogens, 2012. "Information provision by regulated public transport companies," Transportation Research Part B: Methodological, Elsevier, vol. 46(4), pages 492-510.
    16. Banal-Estanol, Albert, 2007. "Information-sharing implications of horizontal mergers," International Journal of Industrial Organization, Elsevier, vol. 25(1), pages 31-49, February.
    17. Albert Banal‐Estañol & Paul Heidhues & Rainer Nitsche & Jo Seldeslachts, 2010. "Screening And Merger Activity," Journal of Industrial Economics, Wiley Blackwell, vol. 58(4), pages 794-817, December.
    18. Doyle, Martin W. & Yates, Andrew J., 2010. "Stream ecosystem service markets under no-net-loss regulation," Ecological Economics, Elsevier, vol. 69(4), pages 820-827, February.
    19. Kojima, Fuhito & Yamashita, Takuro, 2016. "Double auction with interdependent values: incentives and efficiency," TSE Working Papers 16-677, Toulouse School of Economics (TSE).
    20. Davidson, Carl & Mukherjee, Arijit, 2007. "Horizontal mergers with free entry," International Journal of Industrial Organization, Elsevier, vol. 25(1), pages 157-172, February.
    21. Cooper, James C. & Wright, Joshua D., 2012. "Alcohol, antitrust, and the 21st Amendment: An empirical examination of post and hold laws," International Review of Law and Economics, Elsevier, vol. 32(4), pages 379-392.
    22. Tunca, Tunay I., 2008. "Information precision and asymptotic efficiency of industrial markets," Journal of Mathematical Economics, Elsevier, vol. 44(9-10), pages 964-996, September.
    23. Zach Zhizhong Zhou & Kevin Xiaoguo Zhu, 2010. "The Effects of Information Transparency on Suppliers, Manufacturers, and Consumers in Online Markets," Marketing Science, INFORMS, vol. 29(6), pages 1125-1137, 11-12.
    24. Paolo Coccorese, 2010. "Information Exchange as a Means of Collusion: The Case of the Italian Car Insurance Market," Journal of Industry, Competition and Trade, Springer, vol. 10(1), pages 55-70, March.
    25. Myatt, David P. & Wallace, Chris, 2015. "Cournot competition and the social value of information," Journal of Economic Theory, Elsevier, vol. 158(PB), pages 466-506.

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