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Competition and Product Innovation of Intermediaries in a Differentiated Duopoly

Author

Listed:
  • Sonja Brangewitz

    (University of Paderborn)

  • Jochen Manegold

    (University of Paderborn)

Abstract

On an intermediate goods market we allow for vertical and horizontal product differentiation and analyze the influence of simultaneous competition for resources and customers on the market outcome. Asymmetries between intermediaries cannot arise just from distinct product qualities, but also from different production technologies. The intermediaries face either price or quantity competition on the output market and a monopolistic input supplier on the input market. We find that there exist quality and productivity differences such that for quantity competition only one intermediary is willing to procure inputs from the input supplier, while for price competition both intermediaries are willing to purchase inputs. Considering product innovation for symmetric productivities we derive equilibrium conditions on the investment costs and compare price and quantity competition. It turns out that on the one hand there exist product qualities and degrees of horizontal product differentiation for complements such that asymmetric investment equilibria fail to exist. On the other hand we find that there also exist product qualities and degrees of horizontal product differentiation for substitutes such that existence can be guaranteed if the investment costs are chosen accordingly.

Suggested Citation

  • Sonja Brangewitz & Jochen Manegold, 2015. "Competition and Product Innovation of Intermediaries in a Differentiated Duopoly," Working Papers CIE 90, Paderborn University, CIE Center for International Economics.
  • Handle: RePEc:pdn:ciepap:90
    as

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    File URL: http://groups.uni-paderborn.de/wp-wiwi/RePEc/pdf/ciepap/WP90.pdf
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    References listed on IDEAS

    as
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    Cited by:

    1. Jochen Manegold, 2016. "Stackelberg Competition among Intermediaries in a Differentiated Duopoly with Product Innovation," Working Papers CIE 98, Paderborn University, CIE Center for International Economics.

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    More about this item

    Keywords

    Input Market; Product Quality; Quantity Competition; Price Competition; Product Innovation;
    All these keywords.

    JEL classification:

    • L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets
    • D43 - Microeconomics - - Market Structure, Pricing, and Design - - - Oligopoly and Other Forms of Market Imperfection
    • C72 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Noncooperative Games

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