Digital State(s) and Administrative Law. A Comparison between Models of Public Regulation. The formula “Digital State” has been coined in literature to indicate that technological development is nowadays both an intrinsic feature of public power and a phenomenon whose regulation is central to economic and social relations. Firstly, the state “digitizes” itself. The entire public activity is transformed through the application of new technologies. Indeed, the use of technological tools forces public functions to be reorganized while redefining the rules of the exercise of public power. Secondly, public power at the state and supranational levels regulates the digital phenomenon between private parties. Technological development invests economic and social relations to such an extent that existing rules are often unsuitable or obsolete. This creates a need for new public regulation aimed at updating existing disciplines (for example the privacy protection regulation or the competition protection regulation) and introducing new principles and rules for new phenomena. The project is intended to answer two main sets of questions: 1) What are the main models of public regulation of the digital phenomenon in the world? What are the similarities and what are the divergences among these models? Are these models themselves evolving or are they static? Is it possible to discern a process of convergence among models? 2) Does public regulation of the digital phenomenon constitute a momentous change for administrative law? Does it require a different categorization of administrative law, such as “digital administrative law”? Does it require the implementation of new principles, features, and legal remedies?