MAth in Context 5: The Gini index is a statistical The Gini index is defined to be measure of income distribution. two times the area between the It ranges from 0 (or 0%) for line of perfect equality (y=x) and perfect equality to 1 (or 100%) the Lorenz curve, showing the for perfect inequality. percentage of income held by . A country where every each percentile of the country's resident has the same income population: would have a Gini index of 0. 1. Perfect Equality 2. Unequal 100% . . A country in which one resident earned all the income, while everyone else G1=0 96Participation Cumulative earned nothing, would have a G2>0 Gini index of 1. Cumulative 100% ON Cumulative 100% Population 4Population Source : 3. More Unequal 4. Total Inequality https://data.worldbank. org/indicator/SI.POV.GINI?vi ew=map G3> G2 G4=1 Cumulative 100% 0% Cumulative "Population "Population