Much hype has been generated about the importance of innovation for public and private sector organisations. Regulatory Innovation offers the first detailed study of regulatory innovation in a multiplicity of countries and domains. This book draws on in-depth studies of innovation in regulatory instruments and practices across high- and low-technology sectors, across different countries and from the early to the late 20th century. Highlighting different 'worlds' of regulatory innovation - those of the individual, the organization, the state, the global polity, and innovation itself, this book offers a fresh perspective and valuable insights for the practice and study of regulatory innovation. The explicit comparative focus of the case studies and the 'worlds of regulatory innovation' approach make this book essential reading for academic researchers and students interested in regulation.