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The option of joint purchase in vertically differentiated markets


  • WAUTHY, Xavier Y.


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.

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  • GABSZEWICZ, Jean J. & WAUTHY, Xavier Y., 2001. "The option of joint purchase in vertically differentiated markets," CORE Discussion Papers 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

    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," CORE Discussion Papers 2000062, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
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    Cited by:

    1. 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.
    2. 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.
    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. 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.
    5. Francisco Martínez Sánchez, 2016. "Versioning Goods and Joint Purchase: Substitution and Complementarity Strategies," Prague Economic Papers, University of Economics, Prague, vol. 2016(5), pages 577-590.
    6. Anderson, Simon P & Foros, Øystein & Kind, Hans Jarle, 2015. "Competition for advertisers and for viewers in media markets," CEPR Discussion Papers 10608, C.E.P.R. Discussion Papers.
    7. Minniti, Antonio & Vergari, Cecilia, 2010. "Turning Piracy into Profits: a Theoretical Investigation," Information Economics and Policy, Elsevier, vol. 22(4), pages 379-390, December.
    8. 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.
    9. GABSZEWICZ, Jean & WAUTHY, Xavier, 2004. "Two-sided markets and price competition with multi-homing," CORE Discussion Papers 2004030, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).

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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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