Gini coefficient

The Gini coefficient is a measure of inequality developed by the Italian statistician Corrado Gini and published in his 1912 paper "Variabilità e mutabilità". It is usually used to measure income inequality, but can be used to measure any form of uneven distribution. The Gini coefficient is a number between 0 and 1, where 0 corresponds with perfect equality (where everyone has the same income) and 1 corresponds with perfect inequality (where one person has all the income, and everyone else has zero income). The Gini index is the Gini coefficient expressed in percentage form, and is equal to the Gini coefficient multiplied by 100.

References

Dixon, PM, Weiner J., Mitchell-Olds T, Woodley R.

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Boot-strapping the Gini coefficient of inequality. Ecology 1987;68:1548-1551.

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Gini C. "Variabilità e mutabilità" (1912)

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Reprinted in Memorie di metodologica statistica (Ed. Pizetti E, Salvemini, T).

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Rome: Libreria Eredi Virgilio Veschi (1955).

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