Results from the father and mother combined models were largely consistent with those from analyses conducted separately for fathers and mothers, also providing support for social genetic effects on educational attainment and indicating that parental educational attainment, income, and parental bonding serve as mediators of social genetic effects (see Supplemental Table 2). Multi-group analysis by offspring sex did not show significant differences in path coefficients between males and females in all path models, except that the association between father-reported income and offspring educational attainment appeared to be stronger for females than for males (see Supplemental Tables 3 and 4).
