The relationship between marginal (population-averaged) models for cluster-correlated binary data, and a class of cluster-specific, logistic-normal random effects models is discussed. We show that random effects models can accomplish the same end as a more direct modelling of intra-cluster...

In the evaluation of school-based intervention programs, students' knowledge, behavior, and attitudes about a particular issue are typically assessed before and after the intervention. The effectiveness of the intervention can then be gauged by comparing these "pre-treatment" and...