 The Gini Coefficient, a statistical measurement of the inequality present in a nation's income distribution developed by Italian statistician and sociologist Corrado Gini, for the United States has increased over the last few decades.The closer the Gini Coefficient is to one, the closer its income distribution is to absolute inequality.In 2007, the United Nations approximated the United States' Gini Coefficient at 41% while the CIA Factbook placed the coefficient at 45%.