Are the best days of the U.S. economy over?
If you add up all of the innovations made from the late 1800s up to 1970, there's been no comparable stretch of economic growth, before or since, says economist Robert Gordon. According to his new book, "The Rise and Fall of American Growth," slower progress is just the new normal. But in our current computer age, not everyone buys that idea. Economics correspondent Paul Solman reports.
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