This text focuses on the role of the EU in decision-making within international organizations and regimes as a major locus of global governance. The book unpacks the concept of EU performance into four core elements: effectiveness; efficiency; relevance; and financial/resource viability.

While the EU has championed 'effective multilateralism' and experienced a dramatic internal reform process to improve its performance in external relations, broader multilateral processes have also undergone dramatic change. This handbook addresses the increasingly contested issue of profound political importance: Europe's presence in multilateral institutions.