To illustrate this, if the lower half of the income distribution has no income at all, and income is equally distributed across the upper half of the population, the Gini coefficient will be 0.5.

The Gini index, or Gini coefficient, is a summary measure of income inequality representing how income distribution varies compared with an equal outcome. States with the lowest Gini index figures ...

Articles, studies and U.S. Census data focusing on wealth inequality rely on the Gini coefficient. How is it calculated, and what does it tell us? Frank Cowell, an economist at the London School ...

The World Bank's estimate of the Gini Index for the US was 41.1, and China at 42.1, both slightly higher than the average among all countries of 38.8.

For the first time in 12 years, China this month officially reported its Gini coefficient for income inequality for 2012 and retrospectively for the past decade. Zero means perfect equality and 1. ...