Gini index
n.— «The Census Bureau measures income disparity through an established method called the Gini index—named after Italian statistician Corrado Gini. The index measures the gap among incomes of all households.» —“Income gap closes in rural suburbs, Census says” by Haya El Nasser, Paul Overberg USA Today Sept. 13, 2007. (source: Double-Tongued Dictionary)
Further reading
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