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Market-dependent preferences, positive and negative network effects and welfare

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  • Gaumont, Damien
  • Badra, Yassine
  • Kamburova, Detelina

Abstract

This article specifies the conditions on the utility function and on the cost function for which congestion or production overcapacity emerge in a market when information is perfect and prices are flexible. Consumers are of two types: Some appreciate a large production market, some do not. A typology underlines the shape of utility functions and cost functions which generate an optimal production overcapacity or an optimal congestion at the pure strategy Nash equilibrium. We show that the sign of the consumption externalities is endogenous. The result is independent of the nature (positive or negative) of the consumption externalities that affect the consumers’ preferences. A welfare analysis is performed. We underline the conditions under which the social planner chooses whether to clear the market or not. Application to a network economy is developed. Extensions to the following three cases are provided: (1) unsold stocks of goods with or without warehouse inventories, (2) quality of goods and (3) software markets.

Suggested Citation

  • Gaumont, Damien & Badra, Yassine & Kamburova, Detelina, 2023. "Market-dependent preferences, positive and negative network effects and welfare," Mathematical Social Sciences, Elsevier, vol. 123(C), pages 143-154.
    • Handle: RePEc:eee:matsoc:v:123:y:2023:i:c:p:143-154
    DOI: 10.1016/j.mathsocsci.2023.02.005
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