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Gini Coefficient×Index of Dissimilarity×
FieldSociologySociology
FamilyProcess / pipelineProcess / pipeline
Year of origin19121955
OriginatorCorrado GiniOtis Dudley Duncan & Beverly Duncan
TypeScalar measure of statistical dispersion / inequalityIndex of evenness of two groups across units
Seminal sourceCeriani, L., & Verme, P. (2012). The origins of the Gini index: extracts from Variabilità e Mutabilità (1912) by Corrado Gini. The Journal of Economic Inequality, 10(3), 421–443. DOI ↗Duncan, O. D., & Duncan, B. (1955). A methodological analysis of segregation indexes. American Sociological Review, 20(2), 210–217. DOI ↗
AliasesGini index, Gini ratio, Gini concentration ratio, Gdissimilarity index, Duncan index, D index, segregation index
Related55
SummaryThe Gini coefficient is the most widely used single-number summary of inequality in a distribution such as income or wealth. Introduced by the Italian statistician Corrado Gini in 1912, it equals twice the area between the Lorenz curve and the line of perfect equality, ranging from 0 when everyone has the same amount to a maximum approaching 1 when one unit holds everything.The index of dissimilarity, often called the Duncan segregation index, measures how unevenly two groups — such as two racial or occupational groups — are distributed across a set of units like neighborhoods, schools, or occupations. It ranges from 0, when both groups have identical distributions across units, to 1, when the units are completely segregated, and has the intuitive interpretation of the share of one group that would have to relocate to achieve an even distribution.
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ScholarGateCompare methods: Gini Coefficient · Index of Dissimilarity. Retrieved 2026-06-24 from https://scholargate.app/en/compare