This book studies the relationship between administrative capacity and a member state's influence in the European Union. More specifically, it studies member states' ability to exert control over the European Commission during trade negotiations. But what determines administrative capacity and how do member states ensure their preferences are defended during trade negotiations? A combination of qualitative fieldwork and survey-analysis provides the answer. Interviews in Belgium, Poland, Estonia and Spain offer a privileged insight into the functioning of national trade administrations and...