The identification an d measurement of health - related spillovers in impact evaluations
3ie Systematic review 22
This systematic review by Benjamin-Chung et al examines the existing evidence on interventions associated with health-related spillover effects. It seeks to summarise common issues with design, analysis, and reporting and then make recommendations for future studies. The review is important because current methods to estimate such effects are not coherent across sectors. The study found evidence of such spillover effects across several intervention types, including health and education programmes. Many different methods were used to estimate effects and the authors recommend solutions for ensuring that future work which includes health-related spillovers as an outcome. It is hoped that these recommendations should allow for greater comparability of spillover studies in future syntheses.