This book examines the European Union (EU) coordination of the G7, G8 and G20 (Gx). The author comprehensively maps out the different coordination processes for each Gx forum and assesses the procedures used, the actors involved as well as the evolution of the Gx forum over time.List of Figures and Tables Acknowledgements Abbreviations PART I: INTRODUCTION 1. Introduction 1.1. Research approach 1.2. Structure of the book 2. The European Union and the Gx system 2.1. The Gx system: organization and relevance 2.2. The EU in the Gx 3. Analytical and conceptual framework 3.1. Defining EU coordination in international institutions 3.2. Explaining EU coordination in international institutions 3.3. Methods PART II: MAPPING EU COORDINATION 4. EU coordination practices for the Gx system 4.1. G20 4.2. G8 4.3. G7 4.4. Diverging expectations about EU coordination 4.5. The European Parliament and the Gx 4.6. Concluding remarks PART III: EXPLAINING EU COORDINATION 5. Introduction to the cases 5.1. G20 Finance 5.2. G20 Development 5.3. Other G20 cases 5.4. G8 Development 5.5. G8 Energy/climate 5.6. G7 Finance 6. Existing policies 6.1. G20 Finance 6.2. G20 Development 6.3. Other G20 cases 6.4. G8 Development 6.5. G8 Energy/climate 6.6. G7 Finance 6.7. Concluding remarks 7. Interests 7.1. G20 Finance 7.2. G20 Development 7.3. Other G20 cases 7.4. G8 Development 7.5. G8 Energy/climate 7.6. G7 Finance 7.7. Concluding remarks 8. Competences 8.1. G20 Finance 8.2. G20 Development