Why did the European Union experience a stark variation in the levels of conflict between the late 1970s, when budgetary disputes dominated European politics, and the 1990s, when political actors were able to settle upon budgetary agreements without major conflicts?

This book responds to this key question with a two-step argument: Its first part shows that decision-making rules can be regarded as a key determinant of the level of conflict in EU budgetary politics. It details far-reaching reform in 1988 reduced conflict, because it introduced an institutional setting...