Offers a comprehensive analysis of the agency phenomenon in the European Union. It takes stock of the emergence and development of EU agencies, providing insight into the characteristics as well as the consequences of the ongoing EU agencification process.

Jarle Trondal is Professor in public administration at University of Agder, and Professor at ARENA Centre for European Studies, University of Oslo Madalina Busuioc is Post-doctoral Researcher at the Amsterdam Centre for European Law and Governance (ACELG), University of Amsterdam Martijn Groenleer is Assistant Professor in public administration at the Faculty of Technology, Policy and Management, Delft University

Part I Introduction
1. Introducing the phenomenon of European Union agencies
Madalina Busuioc, Martijn Groenleer and Jarle Trondal
Part II The emergence and institutionalisation of EU agencies
2. Building executive power at the European level: on the role of EU-level agencies
Morten Egeberg, Maria Martens and Jarle Trondal
3. Executive power in the making: the establishment of the European Chemicals Agency
Maria Martens
4. Changing the EU's institutional landscape? The added value of an agency
Adriaan Schout
5. Hybrid agencification in the Area of Freedom, Security and Justice and its inherent tensions: the case of Frontex
Jorrit Rijpma
Part III Everyday decision-making in EU agencies: networks, management, accountability and implementation
6. Deliberative regulation through European agencies and other network structures?
Thomas Gehring
7. Wielders of supranational power? The administrative behaviour of the heads of European Union agencies
Madalina Busuioc and Martijn Groenleer
8. The parliamentary accountability of European Union and national agencies
Tobias Bach and Julia Fleischer
9. Catalysts of compliance? The role of European Union agencies in the implementation of European legislation in Poland and Bulgaria
Esther Versluis
Part IV Epilogue
10. EU agencies: Tipping the balance?
Deirdre Curtin and Renaud Dehousse