The main advantage of web search as a prediction tool may have less to do with its superiority over other methods than with its generality, low cost, and real-time nature.
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Matt Cutts explains Google Caffeine.
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He and his co-authors were the first to publish about the fact that flu-related searches on the Web are precise predictors of the upcoming influenza outbreaks.
Congrats.
Best wishes for the rest of their scientific career.
[*] “-Make him a Saint, now!”-, in Italian.