We present an aggregation scheme that increases power in randomized controlled trials and quasi-experiments when the intervention possesses a robust and well-articulated theory of change. Intervention studies using longitudinal data often include multiple observations on individuals, some of which may be more likely to manifest a treatment effect…

We explore the use of instrumental variables (IV) analysis with a multi-site 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, as assumption known in the instrumental variables literature as the…

The purpose of this study was to examine the impact of the i3-funded SPARK program on the literacy development of students in kindergarten through third grade. The SPARK program represents a collaboration between Boys & Girls Clubs of Greater Milwaukee and the Milwaukee Public Schools. In the study, two cohorts of students were randomly…