The economic activity that drives growth in developing countries is heavily concentrated in urban areas. Big cities generate the most dynamic economic development, the strongest links to the global economy, and the resources to help poorer countries become more competitive and prosperous. However, the same advantages that drive investment and growth in these areas also draw migrants who need jobs and housing, lead to demands for better infrastructure and social services, and result in increased congestion, environmental damage, and social problems. Governments in developing countries face two key challenges: how to capture a share of the economic growth to finance the needed expenditures, and how to manage cities so that the urban economy functions efficiently, services are delivered cost-effectively to all, and citizens have a voice in governing the city. This report identifies the critical issues and describes current practice, the gap between practice and theory, and potential reform paths. Two core issues are explored: how to manage complex vertical and horizontal urban governance structures, and how to raise the finances to promote efficient, equitable, and sustainable metropolitan growth. The report explores local revenue instruments, with a focus on property-based local taxes and user charges, as well as external revenue sources such as intergovernmental transfers, borrowing, public-private partnerships, and international assistance. In the 50-plus metropolitan cities considered here, practice often deviates widely from theory and varies greatly across cities. Therefore, it is impossible to make sweeping recommendations for all countries and cities.