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The problem
Intervention: Increased purchasing power of Supplemental Nutrition Assistance Program (SNAP) benefits adjusted for local market prices
Who it was tested with: Children ages 4-6 in families receiving SNAP, from the Early Childhood Longitudinal Study-Birth Cohort.
Children or communities are compared with a group that did not receive the intervention, or followed over years. This is the design that best separates what the intervention did from everything else that changed.
"This study addresses this research gap by examining associations between cumulative SNAP purchasing power and cognitive, socioemotional, and health development among children in early childhood (age 4-6), drawing on data from the Early Childhood Longitudinal Study-Birth Cohort. The study uses two empirical strategies, a two-way (child and year) fixed effects model and a random effects model, to leverage the variation in SNAP purchasing power across the market group and year in which a child is observed." The study employed longitudinal data with quasi-experimental variation in SNAP benefits across geographic and temporal dimensions to examine treatment associations.
Observational design limits causal inference; some key outcomes (math, learning approaches, health) showed associations that were not robust across model specifications and should be interpreted cautiously; limited to early childhood age group.
Across countries and designs
1 study · 1 country