In a discussion on NPR’s Morning Edition, David Wessel and Nathan Hendren discussed social mobility in America. Wessel is director of the Hutchins Center on Fiscal and Monetary Policy at Brookings. Hendren is co-author, with Emmanuel Saez and others, of a new study on patterns of social mobility over time that shows economic mobility has not changed much but is lower in the U.S. than in most other developed countries. Here are David Wessel’s answers to host Steve Inskeep’s questions about the study and social mobility in general.