This paper from authors at IBM is entitled "The Predictive Power of Online Chatter"
From the introduction"..In this paper we look at the relatively new phenomenon of blogs (weblogs) and measure how well it reflects the comparatively old practice of buying books.." and from the conclusion
"..........In this paper we have explored the increasingly widelyheld belief that online “chatter” in the form of blog postings and web discussions may represent an early indicator of “real-world” behavior. We show that volume of blog postings can be used to predict spikes in actual consumer purchase decisions at online retailer Amazon."
[pdf]
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