This note re-examines a finding by Crow et al. (1998) that equal skill of right and left hands is associated with deficits in cognitive ability. This is consistent with the idea that failure to develop dominance of one hemisphere is associated with various pathologies such as learning...

Deprivation early in life has multiple long term consequences for both the individual and society. An increasing body of evidence finds that targeted, early interventions aimed at at-risk children and their families can reduce socioeconomic inequalities in children's skills and capabilities....

Evidence on the sustained effect of early intervention is inconclusive, with many studies experiencing a dissolution of treatment effects once the program ends. Using a randomized trial, this paper examines the impact of Preparing for Life (PFL), a pregnancy to age five home visiting and...

Objective: To estimate the causal effect of breastfeeding on children's cognitive skills as measured at ages 3, 5, 7 and 11. Design: An instrumental variable (IV) strategy which provides a correction method for dealing with selection bias. Standard linear regression models are compared to...