Regulation has become a key form of state activity and an area of burgeoning academic concern, both in Public Law and Economics. This collection makes available to the reader a number of indispensable readings. The text considers the central topics of regulation and looks to theory as well as practice, enforcement as well as rule-making, and supra-national as well as domestic concerns. Particular attention is paid to the ways that regulatory developments can be explained, the choices of technique that confront regulators and the varieties of regulatory style that are encountered within and between different regimes. The introductory essay considers the maturation of regulation both as a practice and as a discipline. It examines regulation as a topic for study, reviews major developments in regulation and outlines central themes. This book is intended as a resource for upper-level undergraduate students and teachers of regulation as part of degree courses in law, economics, business, public policy and politics, but also for those involved in or subject to regulation on a daily basis.