Search reports, ask a question, or jump to a page.
The problem
Intervention: Salt iodization program (and the effects of its disruption)
Who it was tested with: Rural Ethiopian children born before and after the May 1998 border closure that interrupted iodized salt access.
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.
"Using a quasi-experimental event study with difference-in-differences over space and time, we quantify the impacts of iodine deficiency in utero and infancy on childhood mortality and later academic achievement in Ethiopia" — this describes a comparison-group based quasi-experimental design, qualifying as EXPERIMENTAL tier.
The abstract does not specify sample size, exact magnitude of effects, or how confounding factors were controlled beyond the difference-in-differences design.
Across countries and designs
1 study · 1 country
