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Comparing Cournot Duopoly And Monopoly With Asymmetric Differentiated Goods

Author

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  • CHANG, MING CHUNG
  • LIN, YUN-CHIEH
  • LIN, CHIU FEN

Abstract

This study compares a differentiated Cournot duopoly with a two-product monopoly by using the socially optimal solution as a reference point. Each solution is allowedto be either an interior or a corner solution. We establish that the ranking regarding each individual price is clear-cut and normal. In contrast, every one of the rankings regarding individual outputs and industry output can go either way. More importantly, the duopoly may be less welfare-efficient than the monopoly. For example, when demands are linear, lower welfare is achieved if the asymmetry between firms is strong enough. One reason is that when firms are asymmetric, the output structure in the duopoly is distorted with probability one, whereas the output structure in the monopoly is generally socially optimal.

Suggested Citation

  • Chang, Ming Chung & Lin, Yun-Chieh & Lin, Chiu Fen, 2012. "Comparing Cournot Duopoly And Monopoly With Asymmetric Differentiated Goods," Hitotsubashi Journal of Economics, Hitotsubashi University, vol. 53(2), pages 177-200, December.
  • Handle: RePEc:hit:hitjec:v:53:y:2012:i:2:p:177-200
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    File URL: http://hermes-ir.lib.hit-u.ac.jp/rs/bitstream/10086/25380/1/HJeco0530217700.pdf
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    References listed on IDEAS

    as
    1. Ming Chung Chang & Hsiao-Ping Peng, 2012. "Cournot And Bertrand Equilibria Compared: A Critical Review And An Extension From The Output-Structure Viewpoint," The Japanese Economic Review, Japanese Economic Association, vol. 63(4), pages 467-496, December.
    2. Oleksiy Andriychenko & Audrius Girnius & Atanu Saha, 2006. "Complementary Goods: Prices and Consumer Welfare Under Duopoly and Monopoly," International Journal of the Economics of Business, Taylor & Francis Journals, vol. 13(3), pages 373-386.
    3. Hur, Jung, 2006. "Preferential Tariff Policy, Product Quality and Welfare," Hitotsubashi Journal of Economics, Hitotsubashi University, vol. 47(2), pages 197-217, December.
    4. Piercarlo Zanchettin, 2006. "Differentiated Duopoly with Asymmetric Costs," Journal of Economics & Management Strategy, Wiley Blackwell, vol. 15(4), pages 999-1015, December.
    5. Ming Chang, 2010. "An Asymmetric Oligopolist can Improve Welfare by Raising Price," Review of Industrial Organization, Springer;The Industrial Organization Society, vol. 36(1), pages 75-96, February.
    6. Jean Tirole, 1988. "The Theory of Industrial Organization," MIT Press Books, The MIT Press, edition 1, volume 1, number 0262200716, January.
    7. Hugo Sonnenschein, 1968. "The Dual of Duopoly Is Complementary Monopoly: or, Two of Cournot's Theories Are One," Journal of Political Economy, University of Chicago Press, vol. 76, pages 316-316.
    8. Symeonidis, George, 2003. "Comparing Cournot and Bertrand equilibria in a differentiated duopoly with product R&D," International Journal of Industrial Organization, Elsevier, vol. 21(1), pages 39-55, January.
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    Citations

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    Cited by:

    1. Ming Chang & Yan-Ching Ho, 2014. "Comparing Cournot and Bertrand equilibria in an asymmetric duopoly with product R&D," Journal of Economics, Springer, vol. 113(2), pages 133-174, October.

    More about this item

    Keywords

    Cournot duopoly; multi-product monopoly; output structure; horizontal merger; antitrust policy;

    JEL classification:

    • L12 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Monopoly; Monopolization Strategies
    • L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets
    • L41 - Industrial Organization - - Antitrust Issues and Policies - - - Monopolization; Horizontal Anticompetitive Practices

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