Andreas Thiel is Professor of International Agricultural Policy and Environmental Governance at the Faculty of Organic Agricultural Sciences at Universität Kassel, Germany. He is an Affiliated Faculty member of the Ostrom Workshop in Political Theory and Policy Analysis and Senior Fellow at the Centre for Global Cooperation Research at University of Duisburg-Essen. His research addresses the institutional dimension of social-ecological systems with specific focus on governance in the water, agriculture and biodiversity sectors. William A. Blomquist is Professor of Political Science at Indiana University-Purdue University, Indianapolis, and is an Affiliated Faculty member of the Ostrom Workshop in Political Theory and Policy Analysis. He is the author of Dividing the Waters (1992), co-author of Embracing Watershed Politics (2008) and Common Waters, Diverging Streams (2004), and co-editor of Integrated River Basin Management through Decentralization (2007). Dustin E. Garrick is Associate Professor of Environmental Management at the University of Oxford. His research on polycentric governance focuses on water allocation and markets as responses to climate change, urbanization and sustainable development challenges. His book, Water Allocation in Rivers under Pressure (2015), assesses the evolution and performance of water markets and polycentric river basin governance in Australia and the US.

'This book is both well written and carefully structured and edited, making it valuable not only for all social scientists interested in learning about the Ostroms' take on polycentricity and public choice, but also for those interested in applying and extending the ideas of self-governance and polycentric governance to uncharted territories such as pandemics, financial crises, migration, climate change, and cybersecurity, among other pressing fields of inquiry.' Pablo Paniagua, Public Choice

• Introduction Andreas Thiel, William A. Blomquist and Dustin E. Garrick; Part I. Foundations for Understanding and Researching Polycentric Governance Mark Stephan and William A. Blomquist: 1. An introduction to polycentricity and governance Mark Stephan, Graham Marshall and Michael McGinnis; 2. Seeing polycentrically: examining governance situations using a polycentricity lens William A. Blomquist and Nadine Jenny Shirin Schroeder; 3. Foundational aspects of polycentric governance: overarching rules, social-problem characteristics and heterogeneity Andreas Thiel and Christine Moser-Priewich; 4. Evolutionary institutional change and performance in polycentric governance Andreas Thiel, Raúl Pacheco-Vega and Elizabeth Baldwin; Part II. Interactions and Performance in Polycentric Governance Tom Koontz and Dustin E. Garrick: Overview and Introduction Tom Koontz, Tanya Heikkila, Dustin E. Garrick and Sergio Villamayor-Tomas; 5. Cooperation in polycentric governance systems Tom Koontz; 6. Conflict and conflict resolution in polycentric governance systems Tanya Heikkila; 7. Competition in polycentric governance systems Dustin E. Garrick and Sergio Villamayor-Tomas; 8. Assessing performance in polycentric governance system interactions Tom Koontz, Tanya Heikkila, Dustin E. Garrick and Sergio Villamayor-Tomas; Part III. Constituting Polycentric Governance Graham Marshall and Andreas Thiel: 9. Polycentricity and citizenship in environmental governance Graham Marshall and Anas Malik; 10. The Faustian bargain: power-sharing, constitutions, and the practice of polycentricity in governance Vlad Tarko, Edella Schlager and Mark Lutter; 11. Practicing polycentric governance Bryan Bruns; Conclusions Andreas Thiel, William A. Blomquist and Dustin E. Garrick; References.