Communications of the ACM, vol. 54, no. 10 (pp. 121-128). 2011
JCR 2011 impact factor: 1.919
Don't turn social media into another 'Literary Digest' poll
The power to predict outcomes based on Twitter data is greatly exaggerated, especially for political elections.
I delivered a speech at Yahoo! Research Barcelona based on this paper. These are the companion slides for that talk: