This paper formalizes the design of experiments intended specifically to study spillover effects. By first randomizing the intensity of treatment within clusters and then randomly assigning individual treatment conditional on this cluster-level intensity, a novel set of treatment effects can be...

An extensive multi-disciplinary literature examines the effects of learning one's HIV status on subsequent risky sexual behaviors. However, many of these studies rely on non-experimental designs; use self-reported outcome measures, or both. This study investigates the effects of a randomly...

Interventions targeting adolescent girls are seen as a key component in the fight to break the cycle of poverty in developing countries. Policies that enable them to reach their full potential can have a strong impact not only on their own wellbeing, but also on that of future generations. This...