We present evidence of a positive relationship between school starting age and children's cognitive development from age 6 to 18 using a fuzzy regression discontinuity design and large-scale population-level birth and school data from the state of Florida. We estimate effects of being old for grade (being born in September versus August) that are…

With increased rigor and accountability standards in elementary school, the kindergarten curriculum has similarly become more demanding. These increased demands have augmented concerns that young children may not be able to cope with the demands of formal schooling. One way to address concerns about school readiness is by altering a child's…

Examined the effects of age at entrance to first grade on success in elementary school, using a set of demographic, social, and early experience variables as covariates. Concluded that entrance age was a far less powerful predictor of academic achievement than were socioeconomic factors. (Author/GR)