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Is the marginal cost of public funds equal to one?

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Abstract

In a recent article Bas Jacobs found that the marginal cost of public funds (MCF) is one when taxation gives second best resource allocation. This conclusion is based on a claim that there are certain shortcomings with the standard definition of MCF, for example that the size and sign of the standard MCF measure is sensitive to the choice of the untaxed good. A less frequently used definition of MCF is therefore applied instead. If a lump-sum tax is a marginal source for public revenue and taxation is optimal, MCF is one with the proposed definition. The contribution of the present paper is two-fold. First, it finds the standard MCF-measure is not sensitive to the choice of the untaxed good. Second, it finds that the proposed alternative definition has undesirable properties, for example that it could give negative MCF-measures along the upward sloping part of the Laffer curve and is sensitive to the choice of the untaxed good also in cases where this does not make sense. The present paper therefore concludes that there is a weak basis for the conclusion that MCF is one with optimal taxation.

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  • Bjart Holtsmark, 2019. "Is the marginal cost of public funds equal to one?," Discussion Papers 893, Statistics Norway, Research Department.
    • Handle: RePEc:ssb:dispap:893
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    Cited by:

    1. Geir H. M. Bjertnæs, 2020. "The marginal (opportunity) cost of public funds," Discussion Papers 925, Statistics Norway, Research Department.
    2. Åsmund Sunde Valseth & Katinka Holtsmark & Bjart Holtsmark, 2019. "The costs of taxation in the presence of inequality," Discussion Papers 908, Statistics Norway, Research Department.

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    More about this item

    Keywords

    Marginal cost of public funds; taxation; lump-sum taxes; public goods;
    All these keywords.

    JEL classification:

    • H20 - Public Economics - - Taxation, Subsidies, and Revenue - - - General
    • H40 - Public Economics - - Publicly Provided Goods - - - General
    • H50 - Public Economics - - National Government Expenditures and Related Policies - - - General

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