Wages, Schooling and IQ of Brothers and Sisters: Do the Family Factors Differ?
利用美国青年男女的兄弟姐妹数据，分析家庭背景、能力和智商对男女受教育程度和工资的影响是否相同，发现家庭效应基本与性别无关。
This paper investigates whether family background ability and intelligence (IQ) are the same thing for males and females in the sense that they lead to similar consequences for success in schooling and in the market place. Some of the observed market differences could come from a different distribution of abilities across the sexes different rewards in the market place for these abilities and different investment responses by family and individuals. Using data on 150-200 sibling pairs from the US National Longitudinal Survey of Young Men and Young Women the model specifies 2 common factors for the observed data (test scores schooling and early and late wages): 1 factor for ability and the other measuring common endowments across siblings such as wealth. The model is estimated using data on brother-brother sister-sister and brother-sister pairs allowing both the factor loadings and the factors themselves to differ across the sexes. The main finding is that the family effects in the IQ-schooling-wage relationship are essentially sex-blind. The result is especially strong for the IQ-schooling relationship where the observed differences in the data can be accounted for by a higher within family variance among men of the single unobserved ability factor.