Measuring Tax Progressivity: Compatible Global and Local Indexes

Sandy Baum
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Sandy Baum: Skidmore College

Public Finance Review, 1998, vol. 26, issue 5, 447-459

Abstract: This paper analyzes two complementary measures of tax progressivity. Relative Share Adjustment (RSA) is the ratio of after-tax to before-tax shares of income for particular groups. RSA g , a global measure, is the log of RSA averaged over all groups, weighted by group population. It is equal to the absolute change in inequality resulting from the tax, as measured by Theil's index of income inequality. Values for the indexes are computed through application of alternative tax functions to simulated lognormal income distributions. The results highlight the contrasts in the distributional effects of different tax structures of similar overall progressivity.

Date: 1998
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Persistent link: https://EconPapers.repec.org/RePEc:sae:pubfin:v:26:y:1998:i:5:p:447-459

DOI: 10.1177/109114219802600502

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