http://www.businessinsider.com/equality-of-opportunity-project-map-2014-7
Everybody wants to move up in this world.
A big part of the American Dream is the idea that anyone can make it, regardless of where you start out. Children born to lower income families should be able to make it big, and children of the rich shouldn't automatically have success handed to them.
Of course, this is not always the case.
A study by the Equality of Opportunity Project, a collaboration among a number of prominent economists, found that there's a wide variation in economic mobility across different places in the U.S.
One of the main measures of social mobility in the study is called "absolute mobility" by the researchers. Absolute mobility measures where a typical child who starts out in a family in the bottom half of the income distribution will end up in the income distribution among people his or her age when he or she grows up.

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http://www.businessinsider.com/equality-of-opportunity-project-map-2014-7#ixzz386IGBU5s