DRMS are often described as essential in the development of the legal online supply of content, notably of music (In this paper, we do not study the cases of sites that sell pre-recorded music, such as Amazon). That is why they are becoming a crucial stake for the whole recovering music...

In the emerging market of online video services, new media entrants and traditional gatekeepers are making efforts to reinvent the dominant modes of video supply and consumption while fighting for market power and customer lock-in. This article studies, through a number of U.S. and European...