This is a major new text on the changing relationship between the EU and the US in the Twenty-first century, which analyzes the changing patterns of competition and convergence between the two.This text provides historical and analytical context for the study of EU-US relations. It is the integration of work from international political economy, international relations and the management studies field to develop more fully the role of firms in the policy process. Coverage is wider than competing volumes, particularly in respect of historical and analytical context, security issues, competition policy and technology policy.This major new text by leading authorities takes a broad interdisciplinary approach to the changing relationship between the EU and the US in the 21st century and its historical, global and domestic context. The authors focus on the contrast between policy convergence and interdependence on the one hand and intense competition on the other.