Call for papers The unauthorized sharing through P2P networks:

2 You should manage your intellectual property to maximize its value, not to maximize its protection. (...) Growing the market is usually more important than extracting the last dime from your existing business model. Shapiro & Varian, 1998. By contrast to this assertion, record producers try to enforce at all costs their copyrights over the Internet. To achieve this goal, they use various methods to fight against unauthorized sharing: trials against individuals, lobbying for the reinforcement of copyright rules and the setting of prohibitive statutory licences, DRM, access restriction. In so doing, they are singled-minded about duplicating their traditional business methods for the electronic delivery of contents. However, by adopting such enclosure strategies, they not only threaten the existence of P2P networks –which prove to be a much wider innovation than the sole files-swapping technologies aimed at sharing copyrighted contents – but also neglect a major way to increase their profits. This paper is the continuation of a previous study on P2P unauthorized sharing which identifies and compares several scenarios about its economic consequences (Rochelandet, 2004). The curren