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Optimal taxation and market power

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Should optimal income taxation change when firms have market power? The recent rise of market power has led to an increase in income inequality and a deterioration in efficiency and welfare. We analyze how the planner can optimally set taxes on labor income of workers and on the profits of entrepreneurs to induce a constrained efficient allocation. Our results show that optimal taxation in the presence of market power can substantially increase welfare, but it also highlights the severe constraints that the Planner faces to correct the negative externality from market power, using the income tax as a Pigouvian taxes. Pigouvian taxes compete with Mirrleesian incentive concerns, which generally leads to opposing forces. Overall, we find that due to incentive concerns, market power tends to lower marginal tax rates on workers, whereas it increases the marginal tax rate on entrepreneurs.

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  • Jan Eeckhout & Chunyang Fu & Wenjian Li & Xi Weng, 2021. "Optimal taxation and market power," Economics Working Papers 1777, Department of Economics and Business, Universitat Pompeu Fabra.
    • Handle: RePEc:upf:upfgen:1777
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    Cited by:

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    2. Orhan Erem Atesagaoglu & Hakki Yazici, 2021. "Optimal Taxation of Capital in the Presence of Declining Labor Share," CESifo Working Paper Series 9101, CESifo.
    3. Hummel, Albert Jan, 2023. "Tax curvature," Journal of Public Economics, Elsevier, vol. 224(C).
    4. Dami'an Vergara, 2022. "Minimum Wages and Optimal Redistribution," Papers 2202.00839, arXiv.org, revised Dec 2022.
    5. Alexander Tarasov & Robertas Zubrickas, 2021. "Optimal Income Taxation under Monopolistic Competition," CESifo Working Paper Series 9309, CESifo.
    6. Albert Jan Hummel, 2021. "Tax Curvature," CESifo Working Paper Series 9220, CESifo.

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    Keywords

    Optimal taxation; optimal profit tax; market power; market structure; markups;
    All these keywords.

    JEL classification:

    • D3 - Microeconomics - - Distribution
    • D4 - Microeconomics - - Market Structure, Pricing, and Design
    • J41 - Labor and Demographic Economics - - Particular Labor Markets - - - Labor Contracts

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