The document summarizes research on measuring the return on investment and performance of workforce development programs. It discusses methods for establishing causality between programs and outcomes. It then presents results from studies on the net impacts and returns on investment of various workforce programs in Washington state and other states. These include impacts on employment, earnings, skill attainment rates, and returns for participants, taxpayers, and society. The document concludes by noting new requirements in WIOA for indicators to measure employer satisfaction with workforce programs.