1. Is subsidized employment cost-effective for welfare recipients?;Bell;Journal of Human Resources,1994
2. Cost–Benefit Analysis: Concepts and Practice;Boardman,2005
3. The work response to guaranteed income: a survey of experimental evidence;Burtless,1986
4. Propensity score-matching methods for nonexperimental causal studies;Dehejia;The Review of Economics and Statistics,2002
5. Can work incentives pay for themselves?;Ford,2003