Governance by regulation – rules propounded and enforced by bureaucracies – is taking a growing share of the sum total of governance. Once thought to be an American phenomenon, it is now a central form of state action in every part of the world, including Europe, Latin America, and Asia, and it is at the core of much international lawmaking. In Comparative Law and Regulation, original contributions by leading scholars in the field focus both on the legal dimension of regulation and on how this dimension operates in those places that have turned to regulation to meet their obligations.