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Product variety, price elasticity of demand and fixed cost in spatial models

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  • Gu, Yiquan
  • Wenzel, Tobias

Abstract

This paper explores the implications of price-dependent demand in spatial models of product differentiation. We introduce consumers with a quasi-linear utility function in the framework of the Salop (1979) model. We show that the so-called excess entry theorem relies critically on the assumption of completely inelastic demand. Our model is able to produce excessive, insufficient, or optimal product variety. A proof for the existence and uniqueness of symmetric equilibrium when price elasticity of demand is increasing in price is also provided.

Suggested Citation

  • Gu, Yiquan & Wenzel, Tobias, 2009. "Product variety, price elasticity of demand and fixed cost in spatial models," FAU Discussion Papers in Economics 03/2009, Friedrich-Alexander University Erlangen-Nuremberg, Institute for Economics.
    • Handle: RePEc:zbw:iwqwdp:032009
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    Cited by:

    1. Stühmeier, Torben & Wenzel, Tobias, 2011. "Getting beer during commercials: Adverse effects of ad-avoidance," Information Economics and Policy, Elsevier, vol. 23(1), pages 98-106, March.
    2. Gu, Yiquan & Wenzel, Tobias, 2011. "Transparency, price-dependent demand and product variety," Economics Letters, Elsevier, vol. 110(3), pages 216-219, March.

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    JEL classification:

    • L11 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Production, Pricing, and Market Structure; Size Distribution of Firms
    • L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets

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