Family Size, Birth Order, and Educational Attainment

This paper examines the relationship between birth order and educational attainment measured at ages 7, 11, 16, and 23, with particular care taken to separate the effects of birth order from the effects of family size. Since eldest children benefit from their parents' undivided resources at an early age, theory predicts that they may do better educationally than later-born children. This is confirmed by the analysis in this paper, with eldest children performing significantly better than other children on almost all measures of attainment. Youngest children in large families perform less well than middle children, and this effect increases with the age of the child. These findings are robust to the inclusion of a large set of background controls.