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Multiproduct Duopoly with Vertical Differentiation
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Yi-Ling Cheng
Published/Copyright:
August 9, 2011
This paper investigates a two-stage competition in a vertically differentiated industry, where each firm produces an arbitrary number of similar qualities and sells them to heterogeneous consumers. The number of products, qualities, prices, and the extent of the market coverage are endogenously determined. We show that when unit costs of quality improvement are increasing and quadratic, each firm has an incentive to provide a disconnected set of similar qualities approximating a continuum. The finding contrasts sharply with the single-quality outcome when the market coverage is exogenously determined. We also show that allowing for multiple qualities intensifies the level of competition, lowers the profit of each firm, and raises the consumer surplus and the social welfare in comparison to the single-quality duopoly.
Keywords: multiproduct firms; market segmentation; quality competition; continuum of qualities; vertical product differentiation
Published Online: 2011-8-9
©2011 Walter de Gruyter GmbH & Co. KG, Berlin/Boston
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Keywords for this article
multiproduct firms;
market segmentation;
quality competition;
continuum of qualities;
vertical product differentiation
Articles in the same Issue
- Advances Article
- Strategy-Proof Compromises
- Make-or-Buy Decisions and the Manipulability of Performance Measures
- Optimal Mechanism for Selling Two Goods
- A Property of Solutions to Linear Monopoly Problems
- Interactive Epistemology and Solution Concepts for Games with Asymmetric Information
- No-Trade in the Laboratory
- Symmetry or Dynamic Consistency?
- Contributions Article
- When Two-Part Tariffs are Not Enough: Mixing with Nonlinear Pricing
- Sellers Like Clusters
- Network Architecture and the Left-Right Spectrum
- Information, Authority, and Corporate Hierarchies
- The Benefit of Mixing Private Noise into Public Information in Beauty Contest Games
- Intertemporal Bounded Rationality as Consideration Sets with Contraction Consistency
- The Survival Assumption in Intertemporal Economies
- A New Existence and Uniqueness Theorem for Continuous Games
- Multiproduct Duopoly with Vertical Differentiation
- Topics Article
- Sequential Investments, Know-How Transmission, and Optimal Organization
- Input Production Joint Venture
- On the Existence and Social Optimality of Equilibria in a Hotelling Game with Uncertain Demand and Linear-Quadratic Costs
- Stochastic Stability in Finitely Repeated Two Player Games
- Alliance Partner Choice in Markets with Vertical and Horizontal Externalities
- Transitional Dynamics in a Tullock Contest with a General Cost Function
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