International audienceThe regulation of network industries has been profoundly transformed in the past twenty years. First, the “object of regulation” is no longer the same. Network industries have been opened to new dynamics, which have overwhelmed their industrial, technological and marketing frameworks. The relationships between players, of whom there are now significant numbers, and the interaction between users and suppliers have been totally reshaped. Beyond economic structures, these industries have been involved in significant societal changes. In short, networks are the infrastructure of our postmodern societies, the necessary conditions for the provision of a large set of “facilities” that form the foundation of both the economy a...