This special issue focuses on the Temporary Assistance for Needy Families (TANF) program. The collection of articles includes: "Introduction: Reauthorizing TANF"; "The New Face of Welfare: From Income Transfers to Social Assistance?" (Thomas Corbett); "Welfare Then Welfare Now: Expenditures in Some Midwestern States" (members of the WELPAN Network); "Redefining a Case in the Postreform Era: Reconciling Caseload with Workload" (Rebecca Swartz); "Welfare Reform and Recession: Can the States Handle Both?" (Howard Chernick and Andrew Reschovsky); "Social Policy and the Macroeconomy: What Drives Welfare Caseloads?" (James P. Ziliak); "'Whatever We Have Been Doing': Policy Control over TANF" (Thomas Kaplan); "Welfare Reform: The Institutional Dimension" (Lawrence M. Mead);"Reauthorization and the Data Infrastructure: Can We Do Better This Time Around?" (Robert Moffitt and Michele Ver Ploeg); "Welfare Reform, Employment, and Advancement" (V. Joseph Hotz, Charles H. Mullin, and John Karl Scholz); "Promoting Self-Sufficiency: What We Know about Sustaining Employment and Increasing Income among Welfare Recipients and the Working Poor" (Melissa Wavelet and Jacquie Anderson); "The Role of Temporary Employment Agencies in Welfare to Work: Part of the Problem or Part of the Solution?" (David H. Autor and Susan N. Houseman); "Employers and Welfare Recipients: What Their Interactions Imply for Public Policy" (Harry J. Holzer); "Barriers to Employment and the 'Hard to Serve' Implications for Services, Sanctions, and Time Limits" (Sandra K. Danziger and Kristin S. Seefeldt); "Welfare Reform and the Vulnerability of Mothers with Intellectual Disabilities (Mild Mental Retardation)" (Sharon Landesman Ramey and Bette Keltner); "Responding to Changing Family Organization" (Maria Cancian and Daniel R. Meyer); "Unwed Parents: Myths, Realities, and Policymaking" (Irwin Garfinkel and Sara McLanahan); "Assessing the Influence of Welfare Reform on Child Welfare Systems" (Kristen Shook Slack); "Child Care for Low-Income Working Families" (Barbara Wolfe and Deborah Lowe Vandell); "Early Childhood Interventions: Knowledge, Practice, and Policy" (Arthur J. Reynolds); "Strengthening Families: An Agenda for TANF Reauthorization" (Shawn Fremstad and Wendell Primus); "Refreshing Reform: Ideas from British Welfare Strategy" (Robert Walker and Michael Wiseman);"Immigrants and Welfare Reauthorization" (Shawn Fremstad); and "Funding Issues in TANF Reauthorization" (Zoe Neuberger, Sharon Parrott, and Wendell Primus). (SM)