IDEAS home Printed from https://ideas.repec.org/p/kgu/wpaper/120.html
   My bibliography  Save this paper

Strategic Choice on Product Line in Vertically Differentiated Duopoly

Author

Listed:
  • Ryoma Kitamura

    (Graduate School of Economics, Kwansei Gakuin University)

  • Tetsuya Shinkai

    (School of Economics, Kwansei Gakuin University)

Abstract

In a real oligopoly, firms often supply multiple products differentiated by quality in the same market. To examine why they do so, we consider a duopoly model in which firms can choose between supplying two vertically differentiated products and selling a single product in the same market. By deriving equilibriums for possible games and comparing their outcomes with each other, we explored the conditions in which firms strategically determine their product lines, choosing to sell between a single product and two products. The first three are the cases in which both firms supply both products, or they supply either homogeneous product of the two in the same market. The last two are those in which one firm supplies both but another firm does either of the two. We find that a firm producing only one product has an incentive to launch another product as long as it can do so.

Suggested Citation

  • Ryoma Kitamura & Tetsuya Shinkai, 2014. "Strategic Choice on Product Line in Vertically Differentiated Duopoly," Discussion Paper Series 120, School of Economics, Kwansei Gakuin University, revised Aug 2014.
    • Handle: RePEc:kgu:wpaper:120
    as

    Download full text from publisher

    File URL: http://192.218.163.163/RePEc/pdf/kgdp120.pdf
    File Function: First version, 2014
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Motta, Massimo, 1993. "Endogenous Quality Choice: Price vs. Quantity Competition," Journal of Industrial Economics, Wiley Blackwell, vol. 41(2), pages 113-131, June.
    2. Glenn Ellison, 2005. "A Model of Add-On Pricing," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 120(2), pages 585-637.
    3. Joan Calzada & Tommaso M. Valletti, 2012. "Intertemporal Movie Distribution: Versioning When Customers Can Buy Both Versions," Marketing Science, INFORMS, vol. 31(4), pages 649-667, July.
    4. Katz, Michael L & Shapiro, Carl, 1985. "Network Externalities, Competition, and Compatibility," American Economic Review, American Economic Association, vol. 75(3), pages 424-440, June.
    5. Justin P. Johnson & David P. Myatt, 2003. "Multiproduct Quality Competition: Fighting Brands and Product Line Pruning," American Economic Review, American Economic Association, vol. 93(3), pages 748-774, June.
    6. Ryoma Kitamura & Tetsuya Shinkai, 2014. "Cannibalization may Allow a Cost-inefficient Firm to Earn more than a Cost-effcient Firm in a Duopoly with Two Vertically Differentiated Goods," Discussion Paper Series 113, School of Economics, Kwansei Gakuin University, revised Jan 2014.
    7. Ryoma Kitamura & Tetsuya Shinkai, 2013. "The Economics of Cannibalization: A Duopoly in which Firms Supply Two Vertically Differentiated Products," Discussion Paper Series 100, School of Economics, Kwansei Gakuin University, revised Feb 2013.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Ryoma Kitamura & Tetsuya Shinkai, 2014. "Cannibalization within the Single Vertically Di¤erentiated Duopoly," Discussion Paper Series 124, School of Economics, Kwansei Gakuin University, revised Dec 2014.

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Ryoma Kitamura & Tetsuya Shinkai, 2014. "Cannibalization within the Single Vertically Di¤erentiated Duopoly," Discussion Paper Series 124, School of Economics, Kwansei Gakuin University, revised Dec 2014.
    2. Tetsuya Shinkai & Ryoma Kitamura, 2019. "Production Substitution of Goods Within and Between Firms in a Multiproduct Duopoly," Discussion Paper Series 197, School of Economics, Kwansei Gakuin University.
    3. Tetsuya Shinkai & Ryoma Kitamura, 2018. "Product Line Strategy within a Vertically Differentiated Duopoly under Non-negativity Outputs Constraints," Discussion Paper Series 179, School of Economics, Kwansei Gakuin University.
    4. Ryoma Kitamura & Tetsuya Shinkai, 2014. "Cannibalization may Allow a Cost-inefficient Firm to Earn more than a Cost-effcient Firm in a Duopoly with Two Vertically Differentiated Goods," Discussion Paper Series 113, School of Economics, Kwansei Gakuin University, revised Jan 2014.
    5. Ryoma Kitamura & Tetsuya Shinkai, 2015. "Product Line Strategy in a Vertically Di¤erentiated Duopoly," Discussion Paper Series 134, School of Economics, Kwansei Gakuin University, revised Aug 2015.
    6. Tetsuya Shinkai & Ryoma Kitamura, 2021. "How Do the Relative Superiority of a High-quality Good and Cost Inefficiency between Firms Affect Product Lines in Multiproduct Firms?," Discussion Paper Series 230, School of Economics, Kwansei Gakuin University.
    7. Kitamura, Ryoma & Shinkai, Tetsuya, 2015. "Product line strategy within a vertically differentiated duopoly," Economics Letters, Elsevier, vol. 137(C), pages 114-117.
    8. Ryoma Kitamura, 2014. "Network externalities between carriers or machines:How they work in the smartphone industry," Discussion Paper Series 117, School of Economics, Kwansei Gakuin University, revised Mar 2014.
    9. Belleflamme,Paul & Peitz,Martin, 2015. "Industrial Organization," Cambridge Books, Cambridge University Press, number 9781107687899.
    10. Francisco Martínez-Sánchez, 2016. "Versioning Goods and Joint Purchase: Substitution and Complementarity Strategies," Prague Economic Papers, Prague University of Economics and Business, vol. 2016(5), pages 577-590.
    11. Naixin Zhu, 2023. "Dissertation on Applied Microeconomics of Freemium Pricing Strategies in Mobile App Market," Papers 2305.09479, arXiv.org.
    12. Bonatti, Alessandro & Bergemann, Dirk & Haupt, Andreas & Smolin, Alex, 2021. "The Optimality of Upgrade Pricing," CEPR Discussion Papers 16394, C.E.P.R. Discussion Papers.
    13. Stole, Lars A., 2007. "Price Discrimination and Competition," Handbook of Industrial Organization, in: Mark Armstrong & Robert Porter (ed.), Handbook of Industrial Organization, edition 1, volume 3, chapter 34, pages 2221-2299, Elsevier.
    14. Bianchi, Milo & Bouvard, Matthieu & Gomes, Renato & Rhodes, Andrew & Shreeti, Vatsala, 2023. "Mobile payments and interoperability: Insights from the academic literature," Information Economics and Policy, Elsevier, vol. 65(C).
    15. Jonathan Levin, 2011. "The Economics of Internet Markets," Discussion Papers 10-018, Stanford Institute for Economic Policy Research.
    16. Dirk Bergemann & Tibor Heumann & Stephen Morris, 2022. "Screening with Persuasion," Cowles Foundation Discussion Papers 2338, Cowles Foundation for Research in Economics, Yale University.
    17. Mark Armstrong, 2016. "Nonlinear Pricing," Annual Review of Economics, Annual Reviews, vol. 8(1), pages 583-614, October.
    18. Joan Calzada & Guillem Ordóñez, 2012. "Competition in the news industry: fighting aggregators with versions and links," Working Papers 12-22, NET Institute.
    19. Bourreau, Marc & Manenti, Fabio M., 2023. "Selling cross-border in online markets: The impact of the ban on geoblocking strategies," International Journal of Industrial Organization, Elsevier, vol. 86(C).
    20. Jeffrey D. Shulman & Xianjun Geng, 2013. "Add-on Pricing by Asymmetric Firms," Management Science, INFORMS, vol. 59(4), pages 899-917, April.

    More about this item

    Keywords

    Multi-product firm; Duopoly; Strategic choice of product line; Vertical product differentiation; Cannibalization; Launch of product;
    All these keywords.

    JEL classification:

    • D21 - Microeconomics - - Production and Organizations - - - Firm Behavior: Theory
    • 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
    • L15 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Information and Product Quality

    NEP fields

    This paper has been announced in the following NEP Reports:

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:kgu:wpaper:120. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Toshihiro Okada (email available below). General contact details of provider: https://edirc.repec.org/data/dekgujp.html .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.