Deborah Balk is associate professor at the Baruch School of Public Affairs and acting associate director of the Institute for Demographic Research at the City University of New York. Until Fall 2006, she was research scientist at the Center for International Earth Science Information of Network at Columbia University. There she was also lead project scientist for the NASA-funded Socioeconomic Data and Applications Center where she worked on large-scale data integration, and analysis, of geographic, survey, and administrative data. Among her current projects, she is principal investigator on two studies of urbanization and a National Science Foundation-funded project on emerging infectious disease. She is currently a member of the International Union for the Scientific Study of Population working group on Urbanization and two National Research Council panels (on Populations at Risk, and Confidentiality of Data). She received a Ph.D. in demography from the University of California at Berkeley, and Masters and Bachelors degrees from the University of Michigan.