This is the summary of an article by Sitaram Asur and Bernardo A. Huberman. This paper shows how content in social media can be used as a real-world outcome predictor. Twitter.com’s chatter was used to predict movie box-office revenues. The authors created a simple model from tweet rate about certain topics that actually performed better than market-based predictors. Furthermore, Twitter sentiments were also shown to help improve the predicting power of social media. You can get the pdf of the behavioral targeting article here: Predicting the Future With Social Media.