The disparity in wealth between the top and lower echelons of households in the US and other countries has garnered a great deal of research and commentary. But how easy is it to move from one echelon to another—and what could we do to facilitate upward movement? University of Chicago's Ariel Kalil and Ufuk Akcigit join Chicago Booth's Amir Sufi to discuss how early-childhood development, innovation, and inequality affect social mobility. | review.chicagobooth.edu