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Market Power and Income Taxation

Author

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  • Louis Kaplow

Abstract

This article analyzes concerns about market power and inequality in a model with multiple sectors, heterogeneous abilities, endogenous labor supply, and nonlinear income taxation. Proportional markups with no profit dissipation have no effect on the economy, and a policy that reduces a nonproportional markup raises (lowers) welfare when it is higher (lower) than a weighted average of other markups. With proportional (partial or full) profit dissipation, proportional markups are equivalent to a downward shift of the distribution of abilities, and the optimal policy rule with nonproportional markups maximizes consumer plus producer surplus despite concerns for distribution and labor supply distortion.

Suggested Citation

  • Louis Kaplow, 2021. "Market Power and Income Taxation," American Economic Journal: Economic Policy, American Economic Association, vol. 13(4), pages 329-354, November.
    • Handle: RePEc:aea:aejpol:v:13:y:2021:i:4:p:329-54
    DOI: 10.1257/pol.20200103
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    Citations

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    Cited by:

    1. Alexander Tarasov & Robertas Zubrickas, 2021. "Optimal Income Taxation under Monopolistic Competition," CESifo Working Paper Series 9309, CESifo.
    2. Louis Kaplow, 2022. "Optimal Income Taxation," NBER Working Papers 30199, National Bureau of Economic Research, Inc.
    3. Alexander Tarasov & Robertas Zubrickas, 2023. "Optimal income taxation under monopolistic competition," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 76(2), pages 495-523, August.
    4. Kaplow, Louis, 2021. "Horizontal merger analysis," International Journal of Industrial Organization, Elsevier, vol. 79(C).

    More about this item

    JEL classification:

    • D43 - Microeconomics - - Market Structure, Pricing, and Design - - - Oligopoly and Other Forms of Market Imperfection
    • D61 - Microeconomics - - Welfare Economics - - - Allocative Efficiency; Cost-Benefit Analysis
    • H21 - Public Economics - - Taxation, Subsidies, and Revenue - - - Efficiency; Optimal Taxation
    • H23 - Public Economics - - Taxation, Subsidies, and Revenue - - - Externalities; Redistributive Effects; Environmental Taxes and Subsidies
    • H24 - Public Economics - - Taxation, Subsidies, and Revenue - - - Personal Income and Other Nonbusiness Taxes and Subsidies
    • K21 - Law and Economics - - Regulation and Business Law - - - Antitrust Law
    • L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets

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