The Käte Hamburger Kolleg / Centre for Global Cooperation Research seeks to contribute towards a better understanding of the possibilities and limits of transboundary cooperation. By building a learning community, researchers from diff erent disciplines and world regions develop an innovative framework for contemporary cooperation research that enables the exploration of new options for global public policy. We aim to become a crucial hub for this emerging branch of research. We aim to understand the role of transboundary cooperation as an essential part of public policy addressing global challenges.