Jeffrey Hammer teaches at Princeton University where he is the Charles and Marie Robertson Visiting Professor of Economic Development at the Woodrow Wilson School of Public and International Affairs. Previously, he spent 25 years at the World Bank where he held various positions related to public economics, the last three in the New Delhi Office, and was an author of the World Development Report 2004 “Making Services Work for Poor People”. His research interests include economic development, public economics and health in poor countries, particularly in Asia and Africa and more particularly in South Asia. His current research includes the effect of public goods such as sanitation on health; measuring the quality of medical care in poor countries and improving service delivery through better accountability mechanisms. He holds a Ph.D. in Economics from the Massachusetts Institute of Technology.