"Most intervention studies have been silent on the assumed structure of the economic system--implicitly imposing implausible assumptions--despite the fact that inference depends crucially on such issues. This paper proposes to identify the cross-effects of intervention with the level and...

Early Childhood Interventions (ECI) offering disadvantaged children preschool and family support services in the US show long-lasting health impacts. Can these benefits hold when these programs are offered to all children in contexts with universal healthcare? We evaluate the short- and...