Marianne Fay is the Chief Economist of the Sustainable Development Vice Presidency at the World Bank. She previously served as the Chief Economist for Climate Change. She co-directed the World Development Report 2010 on Climate Change and has served in multiple regions of the World Bank Group, including Eastern Europe and Central Asia, Latin America and the Caribbean, and Africa, working on infrastructure, urbanization, and more recently on climate change and green growth. Her research has explored the role of infrastructure and urbanization in development, with a particular focus on urban poverty, climate change, and green growth, on which she has authored numerous articles and books. As chief economist for sustainable development, she led the World Bank’s flagship report for the Rio+20 UN Conference on Sustainable Development, Inclusive Green Growth: The Pathway to Sustainable Development. She holds a Ph.D. in Economics from Columbia University.