Shankar Vedantam

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You know, when we think about disparities in American education, we think about things like race, gender. There is also income, which is one of the most persistent disparities. Children from more affluent families do better in school on average than children from poor families. And there's new social science research exploring why this is the case. To talk about it, I'm joined by NPR social science correspondent Shankar Vedantam. Hey, Shankar.

SHANKAR VEDANTAM, BYLINE: Hi, David.

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There's an old saying that if you want to get something done, always ask a busy person. Researchers have scientifically tested that theory. And NPR's social science correspondent Shankar Vedantam joins us now to explain what they found. Hey ya.

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You know, from Wall Street to Las Vegas, a lot of people take chances. And there's now some new social science research looking at how the mood of a gambler can change the way he thinks about the risk. NPR's Shankar Vedantam is here to explain this. Hey, Shankar.

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Why do people sometimes give generously to a cause — and other times give nothing at all?

That's a timely question, because humanitarian groups fighting the Ebola outbreak need donations from people in rich countries. But some groups say they're getting less money than they'd expect from donors despite all the news.

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