The implicit topology of international institutional complexes varies greatly across policy areas. In some areas, the lion's share of everyday policy cooperation is shaped by a single institution with alternative and more regional institutions operating in its shadow. In other policy fields, institutional structures appear to be different, seeing a range of non-hierarchical, decentralized, alternative institutions. The Institutional Topology of International Regime Complexes: Mapping Inter-Institutional Structures in Global Governance provides a systematic conceptualization and explanation of the evolution of these varying institutional topologies underlying regime complexes across five issue areas of Global Governance: Intellectual Property Protection, Tax Avoidance, Financial Stability, Development Aid, and Energy Governance. By providing an empirically grounded, network-based conceptualization and mapping of institutional topologies, as well as a theoretical explanation for their variation across policy space and time, the book offers a comprehensive analysis of both the empirical manifestation of inter-institutional structures across various policy fields of Global Governance and the issue specific factors that shape the varying institutional trajectories spurring (de-) centralization. Daßler combines quantitative network analyses with qualitative case studies to trace institutional decentralization processes across five highly relevant issue areas of Global Governance. This volume shows how the nature of issue-specific cooperation problems translates into disparate structures among multilateral institutions occupying the same regime complex. In light of growing concerns about the future trajectories of Global Governance in times of heightened geopolitical tensions, Daßler offers a fresh perspective to comparatively capture the profoundly varying institutional landscapes across different issue areas and their associated challenges and benefits of multilateral cooperation. Transformations in Governance is a major academic book series from Oxford University Press. It is designed to accommodate the impressive growth of research in comparative politics, international relations, public policy, federalism, and environmental and urban studies concerned with the dispersion of authority from central states to supranational institutions, subnational governments, and public-private networks. It brings together work that advances our understanding of the organization, causes, and consequences of multilevel and complex governance. The series is selective, containing annually a small number of books of exceptionally high quality by leading and emerging scholars. The series is edited by Liesbet Hooghe and Gary Marks of the University of North Carolina, Chapel Hill, and Walter Mattli of the University of Oxford.