These numbers are based on a standard relative poverty measure, defined as those below 50% of the median disposable income. Relative poverty rate is defined as the share of people living in households with less than 50% of the median disposable income (adjusted for family size and after taxes and transfers) of the entire population. The Gini, probably the most widely used measure of income inequality, is particularly sensitive to changes in the middle of the income distribution, while the other measures focus more on the tails of the distribution.