New approaches to governance have attracted significant scholarly attention in recent years. Commentators on both sides of the Atlantic have identified, charted, and evaluated the rise and spread of forms of governance-forms which seem to differ from previous regulatory and legal paradigms. In Europe, the emergence of the Open Method of Coordination has provided a focal point for new governance studies. In the US, scholarship on issues such as collaborative problem-solving, democratic experimentalism, and problem-solving courts exemplify the interest in similar developments. This book covers diverse policy sectors and subjects, including the environment, education, anti-discrimination, food safety, and many others. It concentrates on the operation of new governance mechanisms in a federal and multilevel context, and looks at the relationship between public and private mechanisms and settings. All the contributors share the common pursuit of effective mechanisms for addressing complex social problems, and the challenges they raise for our understanding of law and constitutionalism.