The Gini ratio (or index of income concentration) is a statistical measure of income equality ranging from 0 to 1. A measure of 1 indicates perfect inequality, i.e., one person has all the income and the rest have none. A measure of 0 indicates perfect equality, i.e., all persons having equal shares of income.

Captial Gains is income recieved from the increased value of a business, stocks, or other property.