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Optimal Energy-Saving Investments and Jevons Paradox in Duopoly Markets

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  • Hirose, Kosuke
  • Matsumura, Toshihiro

Abstract

This study theoretically investigates energy-saving investment incentives in duopolies. First, we investigate a binary choice model in which each firm chooses whether to make an energy-saving investment and then they face Cournot competition. We focus on the incentive to become the leading firm by the investment, when the rival does not engage in this project. We find the private incentive to be insufficient for welfare (thereby requiring promotion through policies), if Pigouvian tax is imposed. However, this incentive can be excessive when the emission tax rate is lower than the Pigouvian level. Next, we investigate a model in which firms can choose energy-saving investment levels continuously. We find that the equilibrium investment can be (is not) excessive for welfare when the emission tax rate is lower than (equal to) the Pigouvian. These results suggest a risk of policy formation combining a low emission tax and subsidies for promoting energy-saving investments.

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  • Hirose, Kosuke & Matsumura, Toshihiro, 2024. "Optimal Energy-Saving Investments and Jevons Paradox in Duopoly Markets," MPRA Paper 121836, University Library of Munich, Germany.
    • Handle: RePEc:pra:mprapa:121836
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    JEL classification:

    • L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets
    • Q38 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Nonrenewable Resources and Conservation - - - Government Policy (includes OPEC Policy)
    • Q58 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Environmental Economics: Government Policy

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