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Irrelevance of Conjectural Variations in Duopoly under Relative Profit Maximization and Consistent Conjectures

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  • Atsuhiro Satoh

    (Faculty of Economics, Doshisha University, Japan)

  • Yasuhito Tanaka

    (Faculty of Economics, Doshisha University, Japan)

Abstract

We study the equilibrium with the quantity setting behavior and price setting behavior of firms in a duopoly under relative profit maximization with constant conjectural variations, and arrive at the following results. 1) Conjectural variations of firms are irrelevant to the equilibrium of a duopoly. 2) Quantity setting behavior and price setting behavior are equivalent to any conjectural variation for each firm. 3) Any pair of conjectural variations of firms which satisfies some relation is consistent. In particular, if firms have the same cost functions or the cost functions are linear, and both firms determine the outputs or both firms determine the prices, any conjectural variations which are common to both firms are consistent. Therefore, there are multiple consistent conjectures.

Suggested Citation

  • Atsuhiro Satoh & Yasuhito Tanaka, 2014. "Irrelevance of Conjectural Variations in Duopoly under Relative Profit Maximization and Consistent Conjectures," Journal of Economics and Management, College of Business, Feng Chia University, Taiwan, vol. 10(2), pages 101-115, July.
    • Handle: RePEc:jec:journl:v:10:y:2014:i:2:p:101-115
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    References listed on IDEAS

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    More about this item

    Keywords

    duopoly; relative profit maximization; conjectural variation; consistent conjecture;
    All these keywords.

    JEL classification:

    • D43 - Microeconomics - - Market Structure, Pricing, and Design - - - Oligopoly and Other Forms of Market Imperfection
    • L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets
    • L21 - Industrial Organization - - Firm Objectives, Organization, and Behavior - - - Business Objectives of the Firm

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