He has been a core team member of the World Development Report 2009: Reshaping Economic Geography and the recent flagship report on Urban China, Senior Economic Counselor to the Indian Prime Minister’s National Transport Development Policy Committee, and Lead Author of the World Bank's flagship report on urbanization "Planning, Connecting, and Financing Cities Now". He currently leads a World Bank program on the Urbanization Review and Spatial Development, which provide diagnostic tools and a policy framework for policy makers to manage rapid urbanization and city development. His research and policy interests span urban and spatial economics, infrastructure development, and public finance, with more than 50 publications featured in peer-reviewed journals, edited volumes, and working papers.