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Cournot competition and the social value of information

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  • Myatt, David P.
  • Wallace, Chris

Abstract

In a differentiated-product Cournot model, each supplier receives informative signals about demand. The cross-industry correlations of the signals differ: more public signals have higher correlation coefficients. In equilibrium, information is used inefficiently. From the industry's perspective, information is over-used, and too much emphasis is placed on relatively public signals; from the consumer's perspective, information is under-used, and too much emphasis is placed on relatively private signals. Welfare is enhanced by increasing the use of information (as desired by consumers) but re-balancing that use away from public signals (as desired by the industry). If information is costly and endogenously acquired, then suppliers acquire too much new information, but they use it too little.

Suggested Citation

  • 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.
  • Handle: RePEc:eee:jetheo:v:158:y:2015:i:pb:p:466-506
    DOI: 10.1016/j.jet.2014.07.011
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    2. Camille Cornand & Rodolphe Dos Santos Ferreira, 2020. "The social value of information and the competition motive: price versus quantity games," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 70(4), pages 1101-1137, November.
    3. Myatt, David P. & Wallace, Chris, 2019. "Information acquisition and use by networked players," Journal of Economic Theory, Elsevier, vol. 182(C), pages 360-401.
    4. Jeitschko, Thomas D. & Liu, Ting & Wang, Tao, 2018. "Information Acquisition, signaling and learning in duopoly," International Journal of Industrial Organization, Elsevier, vol. 61(C), pages 155-191.
    5. Kostas Bimpikis & Davide Crapis & Alireza Tahbaz-Salehi, 2019. "Information Sale and Competition," Management Science, INFORMS, vol. 67(6), pages 2646-2664, June.
    6. Camille Cornand & Rodolphe Dos Santos Ferreira, 2015. "Playing the game the others want to play: Keynes’ beauty contest revisited," Working Papers of BETA 2015-01, Bureau d'Economie Théorique et Appliquée, UDS, Strasbourg.
    7. Cornand, Camille & Dos Santos Ferreira, Rodolphe, 2020. "Cooperation in a differentiated duopoly when information is dispersed: A beauty contest game with endogenous concern for coordination," Mathematical Social Sciences, Elsevier, vol. 106(C), pages 101-111.
    8. Cumbul, Eray, 2021. "Stackelberg versus Cournot oligopoly with private information," International Journal of Industrial Organization, Elsevier, vol. 74(C).
    9. Camille Cornand & Rodolphe dos Santos Ferreira, 2017. "The social value of information and the competition motive: Price vs. quantity games," Working Papers halshs-01614815, HAL.
    10. David Spector, 2021. "Market share transparency, signaling and welfare: Cournot and Bertrand," Working Papers halshs-02946654, HAL.
    11. Li, Wen-na & Elsadany, A.A. & Zhou, Wei & Zhu, Yan-lan, 2021. "Global Analysis, Multi-stability and Synchronization in a Competition Model of Public Enterprises with Consumer Surplus," Chaos, Solitons & Fractals, Elsevier, vol. 143(C).
    12. Leister, C. Matthew, 2020. "Information acquisition and welfare in network games," Games and Economic Behavior, Elsevier, vol. 122(C), pages 453-475.
    13. Roy, Nilanjan, 2017. "Action revision, information and collusion in an experimental duopoly market," MPRA Paper 77033, University Library of Munich, Germany.
    14. Sergio Currarini & Francesco Feri & Bjoern Hartig & Miguel A. Meléndez-Jiménez, 2020. "To Share or Not to Share: An Experiment on Information Transmission in Networks," Working Papers 2020-06, Universidad de Málaga, Department of Economic Theory, Málaga Economic Theory Research Center.
    15. Pavan, Alessandro & Vives, Xavier, 2015. "Information, Coordination, and Market Frictions: An Introduction," Journal of Economic Theory, Elsevier, vol. 158(PB), pages 407-426.
    16. Anna Bayona, 2018. "The social value of information with an endogenous public signal," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 66(4), pages 1059-1087, December.
    17. Francesca Pancotto & Giuseppe Pignataro & Davide Raggi, 2015. "Social Learning and Higher Order Beliefs: A Structural Model of Exchange Rates Dynamics," LEM Papers Series 2015/24, Laboratory of Economics and Management (LEM), Sant'Anna School of Advanced Studies, Pisa, Italy.
    18. P. Figini & S. Cicognani & L. Zirulia, 2019. "Booking in the Rain: Testing the impact of public information on prices," Working Papers wp1137, Dipartimento Scienze Economiche, Universita' di Bologna.
    19. Han, Jungsuk & Sangiorgi, Francesco, 2018. "Searching for information," Journal of Economic Theory, Elsevier, vol. 175(C), pages 342-373.
    20. Jihad C. Elnaboulsi & Wassim Daher & Yigit Saglam, 2020. "Environmental Taxation, Information Precision, and Information Sharing," Working Papers 2020-04, CRESE.

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    More about this item

    Keywords

    Cournot oligopoly; Uncertainty; Bayesian equilibrium; Information acquisition; Public and private information;
    All these keywords.

    JEL classification:

    • C72 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Noncooperative Games
    • D43 - Microeconomics - - Market Structure, Pricing, and Design - - - Oligopoly and Other Forms of Market Imperfection
    • D83 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Search; Learning; Information and Knowledge; Communication; Belief; Unawareness

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