Regulating the internet: does self-regulation call for the design of an institutional framework? Is Internet an ideal model for a self-regulated economy? It seems possible to decentrely organize and render enforceable a property right system on which inter-individual negotiations could be based. Moreover, traditional State intervention is no longer operable since Internet users can bypass the usual regulatory frameworks. A the same time, the long-term sustainability of the competitive process is not guaranteed in the digital economy, and cyber-activities generate externalities that affect the non-users of the Internet. These call for the organization of an institutional framework that would avoid the capture of self-regulations by interest groups seeking to exercises monopoly power. Delegating the management of some essential resources - especially, the addressing system - to an entity responsible for the regulation in the last resort would enable the construction of such a framework.