Income inequality in the United States is hardly a new issue, but the many signs of a widening gap between rich and poor will fuel debate for some time to come.
So it is good to try to understand some of the dimension of the matter.
There are many causes to income inequality, most significantly that labor markets value different skills in different ways. Tending bar pays less well than teaching finance, which is far less well compensated than pitching in Game 6 of the World Series.
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