Additive inputs were those where the contributions of each parent were positive, and identical: 42% fell into this category. Redundancies, with no additional benefit from the input of the second parent, accounted for 12%. The remaining 22% were unique, with positive contributions only from the father or the mother. Specifically, Eggebeen concluded that “fathers appear to especially make unique contributions to the well-being of their children through their human capital while mothers make unique contributions through their availability and closeness to their children.”22 Dads teach, moms tend.
