In the u.s., 34 percent of children age 6 and under live households with monthly income of $72,000. From the child's point of view the situation is a matter of bottom 20 percent.
Two common techniques for assessing income disparity are to rank all houses according to income, from lowest to highest, and then divide all families into five groups with an equal number of members, known as quintiles.
This calculation can be used to determine how the five categories' share of overall income is distributed.
Twenty percent makes up the lowest quintile, or fifth; the second quintile has the next-lowest percentage, and so on.
Income disparity can be measured by comparing the percentage of the total income earned by each quintile.
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