The basic idea of program evaluation is both simple and appealing. Program outcomes are measured and compared to some minimum performance standard or threshold. In practice, however, evaluation is quite difficult. Two fundamental problems of outcome measurement must be addressed. The first,...

Econometric analyses of treatment response commonly use instrumental variable (IV) assumptions to identify treatment effects. Yet the credibility of IV assumptions is often a matter of considerable disagreement. There is therefore good reason to consider weaker but more credible assumptions. To...

Under the new welfare system, states must design and institute programs that both provide assistance and encourage work, two objectives that have thus far appeared incompatible. Will states meet these new requirements? For many innovative programs, the randomized welfare-to-work experiments...

We examine the association between the receipt of vocational rehabilitation (VR) services and Federal Disability Insurance using a unique panel data source on persons who applied for assistance from Virginia's VR program in 2000. Three central findings emerge: first, VR services are associated...

This special volume is dedicated to David H. Dean who passed away on August 11th, 2013. This dedication describes David's impact on the academic research on disability and, most notably, the vital interaction between research and policy. It discusses his influence in shaping perspectives on...

In light of widespread concerns about the reliability of self-reported disability, we investigate what can be learned about the prevalence of work disability under various assumptions on the reporting error process. Developing a nonparametric bounding framework, we provide tight inferences under...