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President Obama and House Speaker John Boehner on Nov. 16. Carolyn Kaster/AP hide caption

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Carolyn Kaster/AP

Investors and financial analysis firms are increasingly looking at "sentimental analysis" — such as Facebook "likes" and Twitter messages — to gauge a company's social popularity. hide caption

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How Much Is A 'Like' On Facebook Worth For A Company's Share Price?

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A young boy works at an illegal gold mine in Dareta, Nigeria. David Gilkey/NPR hide caption

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David Gilkey/NPR