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Linear Commodity Tax Reform and Optimal Commodity Taxes under Partial Separability

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  • Yukihiro Nishimura

    (Graduate School of Economics,Osaka University)

Abstract

Under a regime of nonlinear income tax and fully linear commodity taxes, we may not be able to construct a welfare-improving tax reform towards uniform taxes on a subset of commodities. Furthermore, distortions of production that alter relative wages can improve welfare by influencing mimickers’ consumption choices and thus relaxing incentive compatibility constraints. We then identify conditions for optimal uniform taxation within separated consumption groups. Specifically, to neutralize heterogeneous cross-substitution effects across income classes, uniform commodity taxes require parallel income effects, so the restrictions on the Engel curves cannot be dispensed with even under nonlinear income taxation.

Suggested Citation

  • Yukihiro Nishimura, 2025. "Linear Commodity Tax Reform and Optimal Commodity Taxes under Partial Separability," Discussion Papers in Economics and Business 25-09-Rev2., Osaka University, Graduate School of Economics, revised Jan 2026.
    • Handle: RePEc:osk:wpaper:2509r2
    as

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    References listed on IDEAS

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    1. Kaplow, Louis, 2006. "On the undesirability of commodity taxation even when income taxation is not optimal," Journal of Public Economics, Elsevier, vol. 90(6-7), pages 1235-1250, August.
    2. Paweł Doligalski & Piotr Dworczak & Joanna Krysta & Filip Tokarski, 2025. "Incentive Separability," Journal of Political Economy Microeconomics, University of Chicago Press, vol. 3(3), pages 539-567.
    3. Mikhail Golosov & Narayana Kocherlakota & Aleh Tsyvinski, 2003. "Optimal Indirect and Capital Taxation," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 70(3), pages 569-587.
    4. Jesus Seade, 1982. "On the Sign of the Optimum Marginal Income Tax," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 49(4), pages 637-643.
    5. Emmanuel Saez, 2001. "Using Elasticities to Derive Optimal Income Tax Rates," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 68(1), pages 205-229.
    6. Besley, Timothy & Jewitt, Ian, 1995. "Uniform taxation and consumer preferences," Journal of Public Economics, Elsevier, vol. 58(1), pages 73-84, September.
    7. Atkinson, A. B. & Stiglitz, J. E., 1976. "The design of tax structure: Direct versus indirect taxation," Journal of Public Economics, Elsevier, vol. 6(1-2), pages 55-75.
    8. Jacobs, Bas & Boadway, Robin, 2014. "Optimal linear commodity taxation under optimal non-linear income taxation," Journal of Public Economics, Elsevier, vol. 117(C), pages 201-210.
    9. Spencer Bastani & Sören Blomquist & Jukka Pirttilä, 2015. "How should commodities be taxed? A counter-argument to the recommendation in the Mirrlees Review," Oxford Economic Papers, Oxford University Press, vol. 67(2), pages 455-478.
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    Keywords

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    JEL classification:

    • H21 - Public Economics - - Taxation, Subsidies, and Revenue - - - Efficiency; Optimal Taxation
    • H24 - Public Economics - - Taxation, Subsidies, and Revenue - - - Personal Income and Other Nonbusiness Taxes and Subsidies

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