Martin Ravallion is Director of the Development Research Group of the World Bank. He has held various positions in the Bank, since he joined as an Economist in 1988. He holds a Ph.D. in economics from the London School of Economics, and has taught economics at L.S.E., Oxford University, the Australian National University, and Princeton University. His main research interests over the last 25 years have concerned poverty and policies for fighting it. He has advised numerous governments and international agencies on this topic, and he has written extensively on this and other subjects in economics, including three books and over 170 papers in scholarly journals and edited volumes. He currently serves on the Editorial Boards of ten economics journals, is a Senior Fellow of the Bureau for Research in Economic Analysis of Development, a Founding Council Member of the Society for the Study of Economic Inequality and he serves on the International Advisory Board of the International Poverty Reduction Center, Beijing.