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Horizontal Equity: New Measures, Unclear Principles

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  • Louis Kaplow

Abstract

Alan Auerbach and Kevin Hassett offer a new measure of horizontal equity (HE) that is designed to overcome deficiencies in prior indexes. There is, however, a fundamental problem that their effort shares with their predecessors' attempts: the underlying rationale for pursuing HE at the expense of individuals' well-being is never stated. Moreover, as discussed here, it appears that no plausible rationale can be given because the essence of HE involves giving weight to morally arbitrary factors. Indeed, pursuing HE may even conflict with the Pareto principle. On reflection, it seems that the appeal of HE is specious: HE does not possess intrinsic value, but rather is a rough proxy concept that may signal various ways in which unequal treatment of individuals can lead to a loss in social welfare. Unfortunately, HE indexes are not very useful even with regard to HE's proxy role.

Suggested Citation

  • Louis Kaplow, 2000. "Horizontal Equity: New Measures, Unclear Principles," NBER Working Papers 7649, National Bureau of Economic Research, Inc.
    • Handle: RePEc:nbr:nberwo:7649
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    1. Kaplow, Louis, 1995. "A Fundamental Objection to Tax Equity Norms: A Call for Utilitarianism," National Tax Journal, National Tax Association, vol. 48(4), pages 497-514, December.
    2. Musgrave, Richard A., 1990. "Horizontal Equity, Once More," National Tax Journal, National Tax Association, vol. 43(2), pages 113-22, June.
    3. Kaplow, Louis, 1995. "A Fundamental Objection to Tax Equity Norms: A Call for Utilitarianism," National Tax Journal, National Tax Association;National Tax Journal, vol. 48(4), pages 497-514, December.
    4. Kaplow, Louis, 1996. "How Tax Complexity and Enforcement Affect the Equity and Efficiency of the Income Tax," National Tax Journal, National Tax Association;National Tax Journal, vol. 49(1), pages 135-150, March.
    5. Alan J. Auerbach & Kevin A. Hassett, 2002. "A New Measure of Horizontal Equity," American Economic Review, American Economic Association, vol. 92(4), pages 1116-1125, September.
    6. Kaplow, Louis, 1989. "Horizontal Equity: Measures in Search of a Principle," National Tax Journal, National Tax Association;National Tax Journal, vol. 42(2), pages 139-154, June.
    7. Musgrave, Richard A., 1990. "Horizontal Equity, Once More," National Tax Journal, National Tax Association;National Tax Journal, vol. 43(2), pages 113-122, June.
    8. Louis Kaplow & Steven Shavell, 1999. "Any Non-Individualistic Social Welfare Function Violates the Pareto Principle," NBER Working Papers 7051, National Bureau of Economic Research, Inc.
    9. Louis Kaplow, 1995. "How Tax Complexity and Enforcement Affect the Equity and Efficiency of The Income Tax," NBER Working Papers 5391, National Bureau of Economic Research, Inc.
    10. Kaplow, Louis, 1989. "Horizontal Equity: Measures in Search of a Principle," National Tax Journal, National Tax Association, vol. 42(2), pages 139-54, June.
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    13. repec:bla:scandj:v:98:y:1996:i:1:p:75-92 is not listed on IDEAS
    14. Louis Kaplow, 1985. "Horizontal Equity: Measures in Search of a Principle," NBER Working Papers 1679, National Bureau of Economic Research, Inc.
    15. Kaplow, Louis, 1996. "How Tax Complexity and Enforcement Affect the Equity and Efficiency of the Income Tax," National Tax Journal, National Tax Association, vol. 49(1), pages 135-50, March.
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    Cited by:

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    2. Eissa, Nada & Hoynes, Hilary Williamson, 2000. "Explaining the Fall and Rise in the Tax Cost of Marriage: The Effect of Tax Laws and Demographic Trends, 1984-97," National Tax Journal, National Tax Association, vol. 53(n. 3), pages 683-712, September.
    3. Henrik Jordahl & Luca Micheletto, 2005. "Optimal Utilitarian Taxation and Horizontal Equity," Journal of Public Economic Theory, Association for Public Economic Theory, vol. 7(4), pages 681-708, October.
    4. Hans Gersbach & Volker Hahn & Stephan Imhof, 2013. "Tax rules," Social Choice and Welfare, Springer;The Society for Social Choice and Welfare, vol. 41(1), pages 19-42, June.
    5. James Alm & Sally Wallace, 2007. "Are Jamaica’s Direct Taxes on Labor “Fair†?," Public Finance Review, , vol. 35(1), pages 83-102, January.
    6. Jean‐Yves Duclos, 2006. "Innis Lecture: Equity and equality," Canadian Journal of Economics/Revue canadienne d'économique, John Wiley & Sons, vol. 39(4), pages 1073-1104, November.
    7. Sören Blomquist & Luca Micheletto, 2008. "Age‐related Optimal Income Taxation," Scandinavian Journal of Economics, Wiley Blackwell, vol. 110(1), pages 45-71, March.
    8. Erlend Bø & Peter Lambert & Thor Thoresen, 2012. "Horizontal inequity under a dual income tax system: principles and measurement," International Tax and Public Finance, Springer;International Institute of Public Finance, vol. 19(5), pages 625-640, October.
    9. Jeffrey B. Liebman & Daniel Ramsey, 2019. "Independent Taxation, Horizontal Equity, and Return-Free Filing," NBER Chapters, in: Tax Policy and the Economy, Volume 33, National Bureau of Economic Research, Inc.
    10. Thomas Douenne, 2018. "The vertical and horizontal distributive effects of energy taxes," Policy Papers 2018.05, FAERE - French Association of Environmental and Resource Economists.
    11. Ivica Urban, 2009. "Kakwani decomposition of redistributive effect: Origins, critics and upgrades," Working Papers 148, ECINEQ, Society for the Study of Economic Inequality.
    12. Gerlinde Verbist & Wim Van Lancker, 2016. "Horizontal and Vertical Equity Objectives of Child Benefit Systems: An Empirical Assessment for European Countries," Social Indicators Research: An International and Interdisciplinary Journal for Quality-of-Life Measurement, Springer, vol. 128(3), pages 1299-1318, September.

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    More about this item

    JEL classification:

    • D63 - Microeconomics - - Welfare Economics - - - Equity, Justice, Inequality, and Other Normative Criteria and Measurement
    • H23 - Public Economics - - Taxation, Subsidies, and Revenue - - - Externalities; Redistributive Effects; Environmental Taxes and Subsidies

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