A strongly recommend a listen to this short overview of Susan Athey's work on internet search and market design.
Susan Athey, Department of Economics, Harvard University, discusses her participation in our Research Symposium on the Economics and Law of Internet Search. (Note: Athey and her husband have moved to Stanford)
This is a sample of the research that Athey is leading.
Will Internet search trends offer early signals . . . http://www.capitalspectator.com/archives/2012/06/searching_for_m.html