Wulczyn directs Chapin Hall's Multi-state Foster Care Data Archive, a longitudinal file containing the placement records of nearly 1.25 million foster children from 12 states. He's an expert on service agency administrative data analysis, studying child welfare outcomes and program development, and how states can connect fiscal data to program performance and outcomes. Wulczyn designed the Child Assistance Program, a major social experiment that won the Innovations in Government award from Harvard University and the Ford Foundation. He also developed the nation’s first proposal to change the federal law limiting states' ability to design innovative child welfare programs, which then led to the development of the Title IV-E waiver programs now used by 25 states to undertake system reform in child welfare programs. He continues to develop alternative approaches to financing child welfare programs.