Joost Pauwelyn is Professor of International Law at the Graduate Institute of International and Development Studies (IHEID) in Geneva, Switzerland and Co-Director of the Institute’s Centre for Trade and Economic Integration (CTEI). He is also a Visiting Professor at Georgetown Law Center in Washington DC. Liliana B. Andonova is Professor of Political Science/IR and Academic Co-Director of the Center for International Environmental Studies at the Graduate Institute of International and Development Studies, Geneva. Her research focuses on international institutions, climate change, public-private partnerships, European integration, environmental governance and the interplay between international and domestic politics.