Early Childhood Longitudinal Study, Birth Cohort
The Early Childhood Longitudinal Study, Birth Cohort (ECLS-B), is a study that is part of the Early Childhood Longitudinal Study program; program data is available since 1998-99 at <https://nces.ed.gov/ecls/dataproducts.asp>. ECLS-B (https://nces.ed.gov/ecls/birth.asp) is a longitudinal study that is designed to …