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Free online shows, services indicate boom missed by US GDP

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Since completing a master’s degree in electrical engineering in 2009, Ti Zhao, a self-described “education junkie,” has continued to take classes. The total price tag for the last eight in which she enrolled: $0.00. “It’s hard for me to imagine ever paying for a class again,” said Zhao, who has taken advantage of free studies provided by edX and Coursera Inc., including a public-health course...

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