The use of file-sharing technologies, so-called Peer-to-Peer (P2P) networks, to copy music files has become common since the arrival of Napster. P2P networks may actually improve the matching between products and buyers - we call this the matching effect. For a label the downside of P2P networks...

This note summarizes and updates our previous survey of the economics of digital piracy (Belleflamme and Peitz, 2012).