View source for Studies on file sharing

===OECD - 2004 - Hard-to-establish cost of illegal file-sharing (FR)===
* A report from the OECD in November 2005,  [http://www.oecd.org/dataoecd/11/54/34992262.pdf "Broadband digital content : Music"] sets a very complete picture of the history of the music industry, its economic models, the place of the Internet and peer-to-peer.<br />«"'''Downloading music through P2P networks does not  compulsorily lead every user to choose this method over another way of consumption'''. It is therefore difficult to measure "the cost of illegal file-sharing". This difficulty is mirrored in the results of studies on this subject and in the appreciations of these studies (low answer rates, flaws in the conception of the studies, problems of model definition for empirical works...) Some studies show that unauthorized file-sharing has a negative impact on music sales, but others show that it has a positive effect ; and some others conclude that it has a null impact. According to some people, users substitue legal purchase to downloading, which lower sales, but others argue that file-sharing allows to discover new musics before buying them.. Most studies confirm that both these phenomenons happen in the same time depending on the users : '''unauthorized file-sharing leads some people to increase their consumption and others to decrease it'''."