• Publications
  • Influence
The Economics of Networks
We analyze the salient features of networks and point out the similarities between the economic structure of networks and the structure of vertically related industries. The analysis focuses onExpand
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Network Externalities, Complementarities, and Invitations to Enter
We discuss the incentive of an exclusive holder of a technology to share it with competitors in a market with network externalities. We assume that high expected sales increase the willingness to payExpand
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Two-Sided Competition of Proprietary vs. Open Source Technology Platforms and the Implications for the Software Industry
Technology platforms, such as Microsoft Windows, are the hubs of technology industries. We develop a framework to characterize the optimal two-sided pricing strategy of a platform firm; that is, theExpand
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Symmetric equilibrium existence and optimality in differentiated product markets
Abstract Equilibrium existence and optimality are analysed in a market for products differentiated by their variety. A game of three stages is analysed. Firms enter in the first stage, chooseExpand
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Network neutrality on the Internet: A two-sided market analysis
We discuss network neutrality regulation of the Internet in the context of a two-sided market model. Platforms sell broadband Internet access services to residential consumers and may set fees toExpand
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Desirability of Compatibility in the Absence of Network Externalities
The author compares the incentives firms have to produce individual components compatible with components of other manufacturers instead of "systems" composed of components that are incompatible withExpand
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Abstract Hotelling's (1929) model of duopolistic competition is re-examined. A family of utility functions is used which has as a special case Hotelling's original utility function. In a two-stageExpand
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This article analyzes the competition and integration among complementary products that can be combined to create composite goods or systems. The model generalizes the Cournot duopoly complementsExpand
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Quality variations in the circular model of variety-differentiated products
Quality variations are introduced in the circular model of differentiated products. Two main game structures are analyzed. The three-stage game has entry in the first stage, location in the second,Expand
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The Incentive for Non-Price Discrimination by an Input Monopolist
This paper considers the incentive for non-price discrimination of amonopolist in an input market who also sells in an oligopoly downstreammarket through a subsidiary. Such a monopolist can raise theExpand
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