, the Okun-Model Fellow in Economic Studies and an associate professor in the School of Public Affairs at American University, talks about his research on why people participate, or don't, in social welfare programs like food stamps, and also new research on how past segregation may predict modern-day economic mobility. Also in this episode: , a fellow in Governance Studies, offers her assessment of what's happening in Congress, and what will happen in Congress after the August recess ends. Subscribe to Brookings podcasts  or on , send feedback email to , and follow us and tweet us at  on Twitter. The Brookings Cafeteria is a part of the .