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On Cobb-Douglas Preferences in Bilateral Oligopoly

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  • Dickson, Alex

Abstract

Bilateral oligopoly is a simple model of exchange in which a finite set of sellers seek to exchange the goods they are endowed with for money with a finite set of buyers, and no price-taking assumptions are imposed. If trade takes place via a strategic market game bilateral oligopoly can be thought of as two linked proportional-sharing contests: in one the sellers share the aggregate bid from the buyers in proportion to their supply and in the other the buyers share the aggregate supply in proportion to their bids. The analysis can be separated into two ‘partial games’. First, fix the aggregate bid at B; in the first partial game the sellers contest this fixed prize in proportion to their supply and the aggregate supply in the equilibrium of this game is X˜ (B). Next, fix the aggregate supply at X; in the second partial game the buyers contest this fixed prize in proportion to their bids and the aggregate bid in the equilibrium of this game is ˜B (X). The analysis of these two partial games takes into account competition within each side of the market. Equilibrium in bilateral oligopoly must take into account competition between sellers and buyers and requires, for example, ˜B (X˜ (B)) = B. When all traders have Cobb-Douglas preferences ˜ X(B) does not depend on B and ˜B (X) does not depend on X: whilst there is competition within each side of the market there is no strategic interdependence between the sides of the market. The Cobb-Douglas assumption provides a tractable framework in which to explore the features of fully strategic trade but it misses perhaps the most interesting feature of bilateral oligopoly, the implications of which are investigated.

Suggested Citation

  • Dickson, Alex, 2013. "On Cobb-Douglas Preferences in Bilateral Oligopoly," SIRE Discussion Papers 2013-68, Scottish Institute for Research in Economics (SIRE).
  • Handle: RePEc:edn:sirdps:493
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    File URL: http://hdl.handle.net/10943/493
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    References listed on IDEAS

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    1. Richard Cornes & Roger Hartley, 2005. "Asymmetric contests with general technologies," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 26(4), pages 923-946, November.
    2. Alex Dickson & Roger Hartley, 2013. "Bilateral oligopoly and quantity competition," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 52(3), pages 979-1004, April.
    3. Giulio Codognato & Ludovic A. Julien, 2013. "Noncooperative Oligopoly in Markets with a Cobb-Douglas Continuum of Traders," Recherches économiques de Louvain, De Boeck Université, vol. 79(4), pages 75-88.
    4. Perez-Castrillo, J David & Verdier, Thierry, 1992. "A General Analysis of Rent-Seeking Games," Public Choice, Springer, vol. 73(3), pages 335-350, April.
    5. Alex Dickson & Roger Hartley, 2013. "On ‘Nice’ And ‘Very Nice’ Autarkic Equilibria In Strategic Market Games," Manchester School, University of Manchester, vol. 81(5), pages 745-762, September.
    6. Dickson, Alex & Hartley, Roger, 2008. "The strategic Marshallian cross," Games and Economic Behavior, Elsevier, vol. 64(2), pages 514-532, November.
    7. Giraud, Gael, 2003. "Strategic market games: an introduction," Journal of Mathematical Economics, Elsevier, vol. 39(5-6), pages 355-375, July.
    8. Alex Dickson, 2013. "The Effects of Entry in Bilateral Oligopoly," Games, MDPI, Open Access Journal, vol. 4(3), pages 1-21, June.
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    Cited by:

    1. Alex Dickson, 2017. "Multiple-aggregate games," Working Papers 1701, University of Strathclyde Business School, Department of Economics.

    More about this item

    Keywords

    strategic market game; bilateral oligopoly; Cobb-Douglas preferences; aggregative games;

    JEL classification:

    • D50 - Microeconomics - - General Equilibrium and Disequilibrium - - - General

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