Bringing together pioneering interdisciplinary work from European legal and political scholars, this book combines theory with empirical case studies to explore an underdeveloped field and identify a future research agenda. Chapters first comprehensively examine the relevant legal frameworks and the political aspects of these decentralized agencies' external activities, before exploring the questions this raises around their own and the EU's legitimacy and accountability, and the impact of agencies on countries outside the EU who have dealings with them.

Scholars in law, political science, economics and public administration will find this book invaluable, particularly those working on external relations, agencification or institutional innovation. It will also prove useful to policymakers at EU and national level, as well as other stakeholders such as non-EU countries and international organizations.