The Gini Index explains global income inequality, ranking nations from perfect equality to extreme disparity. Discover how ...

What Is the Gini Coefficient? The Gini coefficient is a statistical measure (between 0 and 1) that quantifies how much a dataset deviates from perfect equality.

"The Gini coefficient provides an index to measure inequality," says Antonio Cabrales, a professor of economics at University College London.

Gini Coefficient is a popular statistical measure to gauge the rich-poor income or wealth divide. It measures inequality of a distribution — be it of income or wealth — within nations or States.