The “Deciles Implied Inequality Indices” for Expressing Income Distribution and Measuring Public Financial Burden of Equalization Policies

Bijan Bidabad

doi:10.46281/aesr.v5i2.347

Bijan Bidabad Professor, Economics and Chief Islamic Banking Advisor, Bank Melli, Iran

DOI: https://doi.org/10.46281/aesr.v5i2.347

Keywords: Income distribution, Inequality Index, Lorenz curve, Public Finance, Equalization Policy.

Abstract

Different ways have been proposed to measure income inequality; there is no best way to calculate the inequality index that expresses income distribution as it is. Popular inequality indices provide information about some points on the distribution function and analyze the inequality of income without reference to the amount of the budget needed to improve the income distribution. In this paper, we propose a set of “Deciles Implied Inequality Indices”. By using this index, we can show how much transfer payment is needed as a redistribution policy to achieve a desired income distribution consistent with the perceived economic goals of the society. That is, we try to find a fiscal-compensation-based index for reducing inequality. By using “Deciles Implied Inequality Indices”, we may measure how much income (tax and subsidy) may be redistributed to reach the targeted income distribution policy.

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