This article explores the statistical methodologies used in demonstration and effectiveness studies when the treatments are applied across multiple settings. The importance of evaluating and how to evaluate these types of studies are discussed. As an alternative to standard methodology, the authors of this article offer an empirical binomial…

Data analysis approaches for program evaluation under the conditions of natural experiments are explored, using evaluation of the DARE program of drug use prevention among elementary school students as an example. The suggested methodology uses multiple independent analyses to demonstrate the convergence or divergence of program outcomes. (SLD)