One voice or different choice? Vote defection of European Union member states in the United Nations General Assembly

Existing research suggests that European Union member states are increasingly able to act in concert in the United Nations General Assembly. Based on several hundred co-ordination meetings per year, the European Union speaks with one voice' on most of the resolutions voted upon in the United Nations General Assembly. However, little is known about instances where the European Union member states do not vote coherently. Three questions remain unanswered. First, what factors determine deviating voting behaviour of European Union member states? Second, who are the most frequent defectors from the European Union's majority position? Third, which voting blocs within the European Union can be identified? The article answers these questions in a quantitative design by controlling for domestic factors, issues of resolutions and the position of the United States. The results suggest that domestic factors determine deviating voting behaviour far less than agenda-related issues and the position of the United States.