This paper assesses nonexperimental estimators using results from a six-state random assignment study of mandatory welfare-to-work programs. The assessment addresses two questions: which nonexperimental methods provide the most accurate estimates; and do the best methods work well enough to...

This paper addresses the question: How does implementation influence the effectiveness of mandatory welfare-to-work programs? Data from three large-scale, multi-site random assignment experiments were pooled; quantitative measures of program implementation were constructed; and multilevel...

<title>Abstract</title> A multi-level analytic framework termed a ‘logic of governance’ is used to identify systematic patterns of health care governance from the findings of disparate research studies. Using a subset of 112 studies on health care service delivery, we use an ‘inside-out’ interpretive...

Using data from the NLSY97, we construct two measures of poverty using the official U.S. definition and the National Research Council (NRC) definition. We estimate the two poverty rates for 1996 for youths 12-16 as 17.9 (official) and 23.4 (NRC), and document the discrepancies between youths...

We explore the use of instrumental variables (IV) analysis with a multisite randomized trial to estimate the effect of a mediating variable on an outcome in cases where it can be assumed that the observed mediator is the only mechanism linking treatment assignment to outcomes, an assumption...