Gary Becker was an intellectual giant. No one had a greater impact on broadening economics and making its impact felt throughout the social sciences thanBecker. Indeed,MiltonFriedmanoncedescribedGaryBecker as the most important social scientist of the second half of the twentieth century. For those of us who knew him, he was themost creative thinker we ever encountered. It was his astounding imagination that made many of his early critics think of him as a heretic. They were correct: he was a heretic much like Luther, Copernicus, and Galileo, who transformed their worlds, just ashe transformedeconomics.Hebrought a rigorous and insightful approach to issues that were viewed as inherently noneconomic. Eventually, he won over the economics profession, detractors and all, who eventually became converts. Becker was a scientist in the true sense of the word.He believed that economics was useful only if it explained andhelped to improve theworld.He practiced what he preached and carefully analyzed all of the social problems he addressed. He was innovative yet rigorous, open to new thought yet disciplined in sticking to the established rules of analysis. Most importantly, he extended the boundaries of economics tomuch of social science.

We study the link between market forces, cross-sectional inequality, and intergenerational mobility. Emphasizing complementarities in the production of human capital, we show that wealthy parents invest, on average, more in their offspring than poorer ones. As a result, economic status persists across generations even in a world with perfect capital markets and without differences in innate ability. In fact, under certain conditions, successive generations of the same family may cease to regress toward the mean. We also consider how short- and long-run mobility are affected by changes in the returns to human capital.