Field experiments documenting positive treatment effects have a strong policy message: scale up! However, such experiments are typically implemented under close supervision of the research group in charge of the study. In contrast, scaling up would typically imply relying on local organisation....

Many adolescent girls in low-income countries face the challenge of early pregnancy and lifelong dependence upon family and partners. In this paper, we review the literature on field interventions aimed at reducing early pregnancies in low-income countries and report from a randomized control...