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Optimal Income Taxation of Married Couples: An Empirical Analysis of Joint and Individual Taxation

Author

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  • Haan, Peter

    (DIW Berlin)

  • Navarro, Dolores

    (Universitat Autònoma de Barcelona)

Abstract

In this paper we develop a discrete model of optimal taxation of married couples and empirically discuss the optimality of income taxation for this group. To this end, we derive the social welfare function which guarantees that joint taxation of married couples is optimal. We will contrast this welfare function with the one that makes a system of individual taxation optimal. For the empirical application we use a static structural labor supply model to estimate the preferences of households. We find that the system of joint taxation is only optimal when the government has a high taste for redistribution towards one-earner couples and a very low or even negative taste for redistribution towards couples in which both partners earn a similar amount of income. In contrast, the optimality of individual taxation is less dependent of the working composition within the household.

Suggested Citation

  • Haan, Peter & Navarro, Dolores, 2008. "Optimal Income Taxation of Married Couples: An Empirical Analysis of Joint and Individual Taxation," IZA Discussion Papers 3819, Institute of Labor Economics (IZA).
    • Handle: RePEc:iza:izadps:dp3819
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    Cited by:

    1. Olivier Bargain & Claire Keane, 2010. "Tax–Benefit‐revealed Redistributive Preferences Over Time: Ireland 1987–2005," LABOUR, CEIS, vol. 24(s1), pages 141-167, December.
    2. Henk-Wim de Boer & Egbert Jongen & Patrick Koot, 2018. "Optimal Taxation of Secondary Earners in the Netherlands: Has Equity Lost Ground?," CPB Discussion Paper 375, CPB Netherlands Bureau for Economic Policy Analysis.
    3. de Boer, Henk-Wim & Jongen, Egbert L. W. & Koot, Patrick, 2023. "Too Much of a Good Thing? Using Tax Incentives to Stimulate Dual-Earner Couples," IZA Discussion Papers 16702, Institute of Labor Economics (IZA).
    4. Olli Kärkkäinen, 2013. "Revealed preferences for redistribution and government’s elasticity expectations," Working Papers 284, Työn ja talouden tutkimus LABORE, The Labour Institute for Economic Research LABORE.
    5. Henk-Wim de Boer & Egbert Jongen & Patrick Koot, 2018. "Optimal Taxation of Secondary Earners in the Netherlands: Has Equity Lost Ground?," CPB Discussion Paper 375.rdf, CPB Netherlands Bureau for Economic Policy Analysis.
    6. Badenes-Plá, Nuria & Blanco Palmero, Patricia & Gambau-Suelves, Borja & Navas Román, María & Villazán Pellejero, Noemí, 2020. "Joint Taxation in Spain and its Effects on Social Welfare: a Microsimulation Analysis," EUROMOD Working Papers EM23/20, EUROMOD at the Institute for Social and Economic Research.

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    More about this item

    Keywords

    joint taxation; optimal taxation of married couples; labor supply estimation;
    All these keywords.

    JEL classification:

    • C25 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Discrete Regression and Qualitative Choice Models; Discrete Regressors; Proportions; Probabilities
    • H21 - Public Economics - - Taxation, Subsidies, and Revenue - - - Efficiency; Optimal Taxation
    • J22 - Labor and Demographic Economics - - Demand and Supply of Labor - - - Time Allocation and Labor Supply

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