Students throw their mortarboards in the air during their graduation photograph at the University of Birmingham degree congregations on July 14, 2009 in Birmingham, England.
Students throw their mortarboards in the air during their graduation photograph at the University of Birmingham degree congregations on July 14, 2009 in Birmingham, England. - 
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Who are the "lost Einsteins?"  That's the question Raj Chetty is trying to answer. He's a professor of economics who works on the Equality of Opportunity Project at Stanford University. The project uses big data sets, like anonymous tax and U.S. Patent records, to figure out who is and who is not innovating in the United States today.   

You can hear more of Kai's conversation with Raj Chetty on Marketplace.org.

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Follow Kai Ryssdal at @kairyssdal