It seems too easy to predict anything using Google or Wikipedia data. Just follow the following plan: a) choose what to predict, b) find searches that give you a positive results.

And this unscientific approach produce articles like this one: “Predicting Recessions in Real-Time: Mining Google Trends and Electronic Payments Data for Clues.”  http://www.cdhowe.org/pdf/Commentary_387.pdf    

Thank you James, I am not criticising the article you mentioned.

I just ready to to bet that I will be able to predict anything on Wikipedia pageviews data.
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