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Tax progression: International and intertemporal comparison using LIS data

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  • Pogorelskiy, Kirill
  • Seidl, Christian
  • Traub, Stefan

Abstract

The conventional approach to comparing tax progression (using local measures, global measures or dominance relations for first moment distribution functions) often lacks applicability to the real world: local measures of tax progression have the disadvantage of ignoring the income distribution entirely. Global measures are affected by the drawback of all aggregation, viz. ignoring structural differences between the objects to be compared. Dominance relations of comparing tax progression depend heavily on the assumption that the same income distribution holds for both situations to be compared, which renders this approach impossible for international and intertemporal comparisons. Based on the earlier work of one of the authors, this paper develops a unified methodology to compare tax progression for dominance relations under different income distributions. We address it as uniform tax progression for different income distributions and present the respective approach for both continuous and discrete cases, the latter also being employed for empirical investigations. Using dominance relations, we define tax progression under different income distributions as a class of natural extensions of uniform tax progression in terms of taxes, net incomes, and differences of first moment distribution functions. To cope with different monetary units and different supports of the income distributions involved, we utilized their transformations to population and income quantiles. Altogether, we applied six methods of comparing tax progression, three in terms of taxes and three in terms of net incomes, which we utilized for empirical analyses of comparisons of tax progression using data from the Luxembourg Income Study. This is the first paper that performs international and intertemporal comparisons of uniform tax progression with actual data. For our analysis we chose those countries for which LIS disposes of data on gross incomes, taxes, payroll taxes and net incomes. This pertains to 15 countries, out of which we selected 13. This gave rise to 78 international comparisons, which we carried out for household data, equivalized data, direct taxes and direct taxes inclusive of payroll taxes. In total we investigated 312 international comparisons for each of the six methods of comparing tax progression. In two thirds of all cases we observed uniformly greater tax progression for international comparisons. In a bit more than one fifth of all cases we observed bifurcate tax progression, that is, progression is higher for one country up to some population or income quantile threshold, beyond which the situation is the opposite, i.e., progression is higher for the second country. No clear-cut findings can be reported for just one tenth of all cases. But even in these cases some curve differences are so small that they may well be ignored. We also test consistency of our results with regard to the six methods of comparing tax progression and present here twelve (Germany, the UK and the US) plus four comparing Germany and Sweden out of the total of 312 graphs, each containing six differences of first moment distribution functions. These differences can be interpreted as intensity of greater tax progression. We demonstrate the overall picture of uniform tax progression for international comparisons using Hasse diagrams. Concerning intertemporal comparisons of tax progression, we present the results for the US, the UK, and Germany for several time periods. We align our findings with respect to major political eras in these countries, e.g., G. Bush senior, W. Clinton, and G. Bush junior for the United States; M. Thatcher, J. Major, and A. Blair for the United Kingdom, and for Germany, the last year before German re-unification (1989), the beginning of H. Kohl's last term as chancellor (1994), and G. Schröder (2000). In addition, we study sensitivity of our results to the equivalence scale parameter. --

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Bibliographic Info

Paper provided by Christian-Albrechts-University of Kiel, Department of Economics in its series Economics Working Papers with number 2010,08.

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Date of creation: 2010
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Handle: RePEc:zbw:cauewp:201008

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Related research

Keywords: income tax progression; measurement of uniform tax progression; comparisons of tax progression; tax progression with different income distributions;

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References

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  1. Peichl, Andreas & Pestel, Nico & Schneider, Hilmar, 2009. "Mehr Ungleichheit durch kleinere Haushalte? Der Einfluss von Veränderungen der Haushaltsstruktur auf die Einkommensverteilung in Deutschland," IZA Standpunkte 18, Institute for the Study of Labor (IZA).
  2. Peichl, Andreas & Pestel, Nico & Schneider, Hilmar, 2009. "Demografie und Ungleichheit: Der Einfluss von Veränderungen der Haushaltsstruktur auf die Einkommensverteilung in Deutschland," IZA Discussion Papers 4197, Institute for the Study of Labor (IZA).
  3. G.B. Hainsworth, 1964. "The Lorenz Curve As A General Tool Of Economic Analysis," The Economic Record, The Economic Society of Australia, vol. 40(91), pages 426-441, 09.
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Cited by:
  1. Silvia Rocha-Akis, 2012. "The Pain and Gain of Offshoring: The Effects of Tax Progression in a Segmented Labour Market," CESifo Working Paper Series 3739, CESifo Group Munich.

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