We treat rising inequality as an equilibrium outcome in which human capital investment fails to keep pace with rising demand for skills. Investment affects skill supply and prices on three margins: the type of human capital in which to invest, how much to acquire, and the intensity of use. The latter two represent the intensive margins of human capital acquisition and utilization. These choices are substitutes for the creation of new skilled workers, yet they are complementary with each other, magnifying inequality. When skill-biased technical change drives economic growth, greater inequality reduces growth.

We consider the link between parents’ influence over the preferences of children, parental investments in children’s human capital, and children’s support of elderly parents. It may pay for parents to spend resources to “manipulate” children’s preferences in order to induce them to support their parents in old age. Since parents invest more in children when they expect greater support, manipulation of child preferences may end up helping children and parents. A new result, which we call the “Rotten Parent Theorem,” demonstrates that if children are altruistic, then even selfish parents will make the optimal investment in their children’s human capital.