MARIA CANCIAN is professor of public affairs and social work and research affiliate of the Institute for Research on Poverty at the University of Wisconsin–Madison. SHELDON DANZIGER is Henry J. Meyer Distinguished University Professor of Public Policy and director of the National Poverty Center at the Gerald R. Ford School of Public Policy at the University of Michigan. CONTRIBUTORS: Mary Jo Bane, Rebecca M. Blank, Maria Cancian, Benjamin Cowan, Sheldon Danziger, Robert Haveman, Harry J. Holzer, Brian A. Jacob, Markus Jäntti, Jens Ludwig, Katherine Magnuson, Daniel R. Meyer, Robert Moffitt, Deborah Reed, Steven Raphael, John Karl Scholz, Eugene Smolensky, Katherine Swartz, Elizabeth Votruba-Drzal, Jane Waldfogel, Geoffrey L. Wallace