Conceptual foundations of institutional interaction / Sebastian Oberthür and Thomas Gehring -- The climate change regime : interactions with ICAO, IMO, and the EU burden-sharing agreement / Sebastian Oberthür -- The convention on biological diversity : tensions with the WTO TRIPS agreement over access to genetic resources and the sharing of benefits / G. Kristin Rosendal -- Protecting the northeast Atlantic : one problem, three institutions / Jon Birger Skjærseth -- Institutional interplay and responsible fisheries : combating subsidies, developing precaution / Olav Schram Stokke and Clare Coffey -- The convention on international trade in endangered species of wild fauna and flora (CITES) : responding to calls for action from other nature conservation regimes / John Lanchbery -- Interactions between the World Trade organization and international environmental regimes / Alice Palmer, Beatrice Chaytor, and Jacob Werksman -- Interactions of EU legal instruments establishing broad principles of environmental management : the water framework directive and the IPPC directive / Andrew Farmer -- The EU habitats directive : enhancing synergy with pan-European nature conservation and with the EU structural funds / Clare Coffey -- The EU deliberate release directive : environmental precaution versus trade and product regulation / Ingmar von Homeyer -- The EU air quality framework directive : shaped and saved by interaction? / Jørgen Wettestad -- Comparative empirical analysis and ideal types of institutional interaction / Thomas Gehring and Sebastian Oberthür.