Trajectories of regional cooperation: a comparative analysis

Cooperation between states takes place in International Organizations (IOs) and Regional Organizations (ROs). Since we know more about the evolution of cooperation in IOs than ROs, this paper examines trajectories of regional cooperation. Based on a novel dataset, it provides a descriptive analysis of how all 76 ROs developed over time. This reveals that regional cooperation evolved in two waves with respect to RO size as well as the policy areas of cooperation. The paper adopts an explorative approach to examine these patterns. This reveals that ROs with regional courts and ROs which adopt a model of dynamic change are more likely to broaden their policy scopes. In addition, during the Cold War, ROs with initially broad policy scopes were less likely to obtain additional competencies, while after 1990 ROs were more likely to broaden their policy scopes when they are large in size, when their members are economically strong and when majority decisions are possible in their day-to-day operation.