The rich tend to be lumped together as one economic group, as if people earning $250,000 a year (or even $1 million a year) are pretty much the same as those making $50 million.
But a new analysis of top incomes tells us that there is a big difference between the super-rich and the merely rich in how they earn money.
The paper, from Roberton Williams of the Tax Policy Center, compares two sets of 2009 IRS data. One group is American tax filers reporting income of $1 million or more. The other is for the 400 top earners in America, who made an average of $271 million each.