Multisite trials, which are being used with increasing frequency in education and evaluation research, provide an exciting opportunity for learning about how the effects of interventions or programs are distributed across sites. In particular, these studies can produce rigorous estimates of a cross-site mean effect of program assignment…

In this article, the author shares his comments on statistical analysis for multisite trials, and focuses on the contribution of Stephen Raudenbush, Sean Reardon, and Takako Nomi to future research. Raudenbush, Reardon, and Nomi provide a major contribution to future research on variation in program impacts by showing how to use multisite trials…

This paper uses data from the Head Start Impact Study (HSIS), a nationally representative multisite randomized trial, to quantify variation in effects of Head Start during 2002-2003 on children's cognitive and socio-emotional outcomes relative to the effects of other local alternatives, including parent care. We find that (1) treatment and control…

Participants in Comprehensive Employment and Training Act-sponsored classroom training, on the job-training, and subsidized work experience were compared to a Current Population Survey sample. Female participants in all types of training had increased earnings (primarily due to increased employment), while males did not. (GDC)

This paper examines how controlling statistically for baseline covariates (especially pretests) improves the precision of studies that randomize schools to measure the impacts of educational interventions on student achievement. Part I of the paper introduces the concepts, issues, and options involved. Parts II and III present empirical findings…

The Accelerated Schools Approach is a whole-school reform being implemented in more than 1,000 U.S. elementary and middle schools. The program is characterized by a school structure that sets high expectations for students and teachers, a governance structure with broad teacher participation, and a "powerful learning" approach to…

This paper poses a question of direct relevance for welfare administrators, program operators, and policy makers: What management practices, program strategies, and local conditions are key to running effective welfare-to-work programs? To address this question, the present analysis links detailed measures of program characteristics to valid and…

This monograph presents results from a study of the Texas Worker Adjustment Demonstration, a 2,192-person randomized experimental evaluation of reemployment programs for displaced workers conducted at three Texas sites during 1984-85. It describes in detail: (1) the background, design, conduct, and content of the programs at each demonstration…