This innovative book presents a transatlantic comparison of governance and Intergovernmental Relations (IGR) policy, performance and management. By examining both analytical and empirical differences and similarities between the European Union and the United States, this comprehensive book provides a better understanding of (inter) governmental systems, settings and actors operating in the post New Public Management Era. The expert contributors consider processes of policy formulation and implementation from an intergovernmental point of view, examine issues of performance and accountability that rise in IGR settings and zoom in on the importance and implications of IGR for welfare. Taken together, these insights provide an important next step into the world of transatlantic research and comparison. This timely book will appeal to academics and researchers involved in IGR and Multi-Level Governance from the US and Europe as well as post-graduate students in public administration and public policy.