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A note on Arévalo-Tomé and Chamorro-Rivas: Location as an instrument for social welfare improvement in a spatial model of Cournot competition


  • Chia-Hung Sun

    (National Taipei University)


In a recent paper in this journal, Arévalo-Tomé and Chamorro-Rivas claim to have shown that, in a two-stage game where Cournot duopoly firms discriminate over two marketplaces on a line, a social planner can use the firm’s location variable as an instrument for reallocating production from the equilibrium spatial pattern to the optimal outcome. This note points out that with linear demand there is no need to use such an instrument for social welfare improvement, because the equilibrium locations are indeed socially optimal. The note also discusses the possibility of using such an instrument for general demand.

Suggested Citation

  • Chia-Hung Sun, 2009. "A note on Arévalo-Tomé and Chamorro-Rivas: Location as an instrument for social welfare improvement in a spatial model of Cournot competition," Investigaciones Economicas, Fundación SEPI, vol. 33(1), pages 131-141, January.
  • Handle: RePEc:iec:inveco:v:33:y:2009:i:1:p:131-141

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    Cited by:

    1. Chia-Hung Sun & Fu-Chuan Lai, 2014. "Spatial price discrimination in a symmetric barbell model: Bertrand vs. Cournot," Papers in Regional Science, Wiley Blackwell, vol. 93(1), pages 141-158, March.

    More about this item


    Spatial competition; Cournot; welfare.;

    JEL classification:

    • L11 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Production, Pricing, and Market Structure; Size Distribution of Firms


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