University of London researchers, Birgitte Andersen and Marion Frenz surveyed a large group of Canadians and concluded that that people who download more music actually buy more CDs: "We estimate that the effect of one additional P2P download per month is to increase music purchasing by 0.44 CDs per year." This translates into: if someone downloads 270 songs a year, he or she will buy 9 CDs more than someone who only downloads 27 songs. Overall the researchers found no difference between pirates and other people in the number of CDs they buy nor did they find a positive or a negative relationship between filesharing and CD sales. Quick, someone send a memo to the RIAA that they're suing their own customers.
News source: TorrentFreak