См., к примеру, Hyunyoung Choi and Hal Varian, “Predicting the Present with Google Trends”, Google Inc., 10 апреля 2009 г., http://static.googleusercontent.com/external_content/untrusted_dlcp/www.google.com/en/us/googleblogs/pdfs/google_predicting_the_present.pdf (по состоянию на 11 сентября 2013 г.); Lynn Wu and Erik Brynjolfsson, “The Future of Prediction: how Google Searches Foreshadow housing Prices and Sales”, SSRN Scholarly Paper (Rochester, NY: Social Science Research Network, 2013), http://papers.ssrn.com/abstract=2022293.
