SUDHIR VENKATESH is William B. Ransford Professor of Sociology at Columbia University. He has written extensively about American poverty and is currently working on a project comparing the urban poor in France and the United States. His writings, stories, and documentaries have appeared in The American Prospect, This American Life, The Source, PBS, and National Public Radio. Venkatesh's latest book, Floating City: A Rogue Sociologist Lost and Found in New York's Underground Economy, was published in September 2013 by The Penguin Press.