Between 1970 and the early 2000s, there was a revolution in support for the use of field experiments to evaluate social programs. Focusing on the welfare reform studies that helped to speed that transformation in the United States, this chapter describes the major challenges to implementing...

This study investigates effects of welfare reform in the U.S., a major policy shift that increased employment of low-income mothers and reliance on their own earnings instead of cash assistance through the welfare system, on the quality of the home environments they provide for their...