The Gini coefficient (also known as the Gini index or Gini ratio) (/dʒini/jee-nee) is a measure of statistical dispersion intended to represent the income distribution of a nation's residents, and is the most commonly used measure of inequality. It was developed by the Italian statistician and sociologist Corrado Gini and published in his 1912 paper Variability and Mutability (Italian:Variabilità e mutabilità).