Google Flu Trends, once a poster child for the power of big-data analysis, seems to be under attack. This month, four quantitatively adept social scientists reported that Google's flu-tracking service not only wildly overestimated the number of flu cases in the U.S. in the 2012-13 flu season—a well-known miss—but has also consistently overshot in the past few years.
Google Flu Trends: The limits of big data
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