Calogero (Gero) Carletto is a Lead Economist and the Manager of the Rome-based Center for Development Data (C4D2) and of the Living Standards Measurement Study (LSMS) in the Development Data Group at the World Bank. Gero has more than twenty-five years of experience in the collection, analysis and dissemination of household survey data, as well as in other areas of statistics and policy analysis. His research interests are in the areas of poverty, food security, agriculture and rural development, as well as in data collection methods and measurement issues. He has published more than eighty articles, books and book chapters on various topics in development economics and statistics. He has previously worked for various United Nations’ Agencies and for the International Food Policy Research Institute (IFPRI). He holds a Ph.D. in Agricultural and Resource Economics from the University of California at Berkeley.