The Review of Black Political Economy

, Volume 28, Issue 3, pp 41–57 | Cite as

A lorenz curve based index of income stratification

  • Geoffrey Warner


This paper introduced a method of calculating the proportion, and its standardized index, of the GINI coefficient that is due to the overlapping of the incomes of different groups in a population. This Lorenz curvebased index measures the degree to which all groups, collectively, form different strata in a population as opposed to the degree to which an individual group forms a stratum in the population. It is useful for describing the degree of integration or segregation in a population as opposed to the degree of integration or segregation of a group within a population.

The new index was applied to distributions of wage and salary income for individuals and family income for households. The results indicate that racial/ethnic income stratification is more marked among men than women.


Income Inequality GINI Coefficient GINI Index Lorenz Curve Occupational Segregation 
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© Springer 2001

Authors and Affiliations

  • Geoffrey Warner

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