result taller and heavier parents should have more sons relative to daughters. Using two British cohort studies, evidence was … parents' height and weight using one of the datasets. No evidence of any such relationship is found. …

While recent research finds strong evidence that birth order affects children's outcomes such as education, IQ scores …

two children with the same mother but where a parent of the mother died during one of the pregnancies - augmented with a …

Objective: To estimate the causal effect of breastfeeding on children's cognitive skills as measured at ages 3, 5, 7 …). Participants: Data on 11,792 (age 3) and 9117 (age 5) children in MCS and 4923 (age 7 and 11) children in NCDS. Main outcome …: The duration of breastfeeding has a small, but significant, effect on children's cognitive skills in the linear regression …

effect of teen childbearing. Despite this, there are still reasons to believe that children of teen mothers may do worse as … lower quality. Using Norwegian register data, we compare outcomes of children of sisters who have first births at different … children born to the youngest teen mothers. Unlike previous research, we have information on fathers and find that negative …