Income inequality, as measured by the Gini coefficient, varies significantly across the United States. The Gini coefficient is a measure of income distribution that ranges from 0 (perfect equality) to 1 (perfect inequality). Though the effect varies from state to state, a 0.01 change in Gini means the top 10% of households are earning about $1,500-$2,400 more per year relative to the poorest.
