Confronted with the challenge of improving regulatory performance, many governments in the world are looking for ways to better manage risks, in particular those risks that develop in complex systems, with stakeholders from various sectors, and that are marked by uncertainty. This report includes five authored pieces about: The contribution of transnational private regulation to revisiting risk regulation (Scott), Emerging strategies to manage system-level risks: an examination of private sector, government and non-governmental organization initiative (Yosie), Potential scope and challenges of behaviourally informed regulation (Renn and Florin), and Managing uncertainty in drug development and use, by enhancing adaptability and flexibility in pharmaceuticals regulation (Oye et al.).