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Quality, Upgrades, and Equilibrium in a Dynamic Monopoly Model

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  • James J. Anton
  • Gary Biglaiser

Abstract

We examine an infinite horizon model of quality growth in a durable goods monopoly market. The monopolist generates new quality improvements over time and can sell any available qualities, in any desired bundles, at each point in time. Consumers are identical and for a quality improvement to have value the buyer must possess previous qualities--goods are upgrades. We show that subgame perfect equilibrium payoffs for the seller range from capturing the full social surplus all the way down to capturing only the current flow value of each good and that each of these payoffs is realized in a Markov perfect equilibrium that follows the socially efficient allocation path. This is true for all discount factors. We also show that inefficient equilibria exist for rates of innovation above a threshold.

Suggested Citation

  • James J. Anton & Gary Biglaiser, 2010. "Quality, Upgrades, and Equilibrium in a Dynamic Monopoly Model," Working Papers 10-36, Duke University, Department of Economics.
    • Handle: RePEc:duk:dukeec:10-36
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    References listed on IDEAS

    as
    1. Larry M. Ausubel & Raymond J. Deneckere, 1989. "Reputation in Bargaining and Durable Goods Monopoly," Levine's Working Paper Archive 201, David K. Levine.
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