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The option of joint purchase in vertically differentiated markets

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  • GABSZEWICZ, Jean J.
  • WAUTHY, Xavier Y.

Abstract

Within the framework proposed by Mussa and Rosen (1978) for modelling quality differentiation, we allow consumers to buy simultaneously different variants of the same indivisible good. We call this the "joint purchase option". We show that this option dramatically affects price competition: while a unique equilibrium always prevails when consumers are assumed to make mutually exclusive purchases, either uniqueness, or multiplicity, or absence of price equilibrium arise when the joint purchase option is opened depending on the utility attached to joint purchase relative to separate purchases.

Suggested Citation

  • GABSZEWICZ, Jean J. & WAUTHY, Xavier Y., 2001. "The option of joint purchase in vertically differentiated markets," LIDAM Discussion Papers CORE 2001013, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
    • Handle: RePEc:cor:louvco:2001013
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    References listed on IDEAS

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    1. Gabszewicz, Jean & Sonnac, Nathalie & Wauthy, Xavier, 2001. "On price competition with complementary goods," Economics Letters, Elsevier, vol. 70(3), pages 431-437, March.
    2. Mussa, Michael & Rosen, Sherwin, 1978. "Monopoly and product quality," Journal of Economic Theory, Elsevier, vol. 18(2), pages 301-317, August.
    3. GABSZEWICZ, Jean & WAUTHY, Xavier, 2000. "Another perverse effect of monopoly power," LIDAM Discussion Papers CORE 2000062, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
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    Cited by:

    1. Maria Rosa Battaggion & Alessandro Vaglio, 2020. "Advertising Caps and News Quality," Economics Bulletin, AccessEcon, vol. 40(1), pages 117-127.
    2. Gautier Axel & Poudou Jean-Christophe, 2014. "Reforming the Postal Universal Service," Review of Network Economics, De Gruyter, vol. 13(4), pages 453-477, December.
    3. Anderson, Simon P. & Foros, Øystein & Kind, Hans Jarle & Peitz, Martin, 2012. "Media market concentration, advertising levels, and ad prices," International Journal of Industrial Organization, Elsevier, vol. 30(3), pages 321-325.
    4. Leonard K. Cheng & Jae Nahm, 2007. "Product boundary, vertical competition, and the double mark-upproblem," RAND Journal of Economics, RAND Corporation, vol. 38(2), pages 447-466, June.
    5. Anderson, Simon P. & Foros, Øystein & Kind, Hans Jarle, 2012. "Product quality, competition, and multi-purchasing," Discussion Papers 2012/9, Norwegian School of Economics, Department of Business and Management Science.
    6. LATZER, Hélène & MAYNERIS, Florian, 2012. "Income distribution and vertical comparative advantage. Theory and evidence," LIDAM Discussion Papers CORE 2012034, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
    7. Simon P. Anderson & Øystein Foros & Hans Jarle Kind, 2018. "Competition for Advertisers and for Viewers in Media Markets," Economic Journal, Royal Economic Society, vol. 128(608), pages 34-54, February.
    8. 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.
    9. Jiangli Dou & Bing Ye, 2018. "Product Differentiation, Exclusivity, and Multi-purchasing," Annals of Economics and Finance, Society for AEF, vol. 19(1), pages 301-318, May.
    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. GABSZEWICZ, Jean & WAUTHY, Xavier, 2004. "Two-sided markets and price competition with multi-homing," LIDAM Discussion Papers CORE 2004030, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
    12. Qiuyu Lu & Noriaki Matsushima, 2023. "Personalized pricing when consumers can purchase multiple items," ISER Discussion Paper 1192, Institute of Social and Economic Research, Osaka University.
    13. Maria Rosa Battaggion & Alessandro Vaglio, 2015. "Pin-ups and Journalists: A Model of Media Market with News and Entertainment," Journal of Media Economics, Taylor & Francis Journals, vol. 28(4), pages 217-245, October.
    14. Thomas D. Jeitschko & Yeonjei Jung & Jaesoo Kim, 2017. "Bundling and joint marketing by rival firms," Journal of Economics & Management Strategy, Wiley Blackwell, vol. 26(3), pages 571-589, September.
    15. Hélène Latzer & Florian Mayneris, 2011. "Trade in quality and income distribution: an analysis of the enlarged EU market," Working Papers of BETA 2011-21, Bureau d'Economie Théorique et Appliquée, UDS, Strasbourg.
    16. P. M. Picard & A. Tampieri, 2021. "Vertical differentiation and trade among symmetric countries," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 71(4), pages 1319-1355, June.
    17. Minniti, Antonio & Vergari, Cecilia, 2010. "Turning Piracy into Profits: a Theoretical Investigation," Information Economics and Policy, Elsevier, vol. 22(4), pages 379-390, December.

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    JEL classification:

    • L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets

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