ASPE anticipates undertaking three related projects using the newly available source of welfare reform data collected through the Emergency TANF Data Report (ETDR): (1) working with the Administration for Children and Families’ Office of Planning, Research, and Evaluation, to improve the collection, storage, and release of these data; (2) doing crosssectional analyses using all data from all states; and (3) assessing the feasibility of creating a longitudinal database using data from individual states. The first step would be to resolve the technical issues associated with cheaply storing and transferring the large amounts of data required for a comparative analysis of AFDC and TANF and then building an archive of TANF data for researchers. Second, crosssectional analyses would compare AFDC and TANF using a “before vs after” welfare reform notion, analyzing similarities and differences in the caseloads. Finally, a single state with good data would be selected to explore the research potential of developing a longitudinal data set, preferably combined with additional linked data sets for more indepth analyses. Longitudinal analyses in this early phase of administrative data reporting would focus on shortterm outcomes, including changes in work participation, child care use, Medicaid, and household composition (especially to childonly cases and conversion of twoparent to oneparent cases). If successful, this feasibility work will lay the groundwork for more extensive creation of state longitudinal databases.