Sudhir Venkatesh is William B. Ransford Professor of Sociology at Columbia University in the City of New York. He is a researcher and writer on urban neighborhoods in the United States (New York, Chicago) and Paris, France. He is also a documentary film-maker. His most recent book is Gang Leader for a Day. In 2006 he also published Off the Books: The Underground Economy of the Urban Poor about illegal economies in Chicago. Off the Books received a Best Book Award from Slate.Com (2006) as well as the C. Wright Mills Award (2007). His first book, American Project: The Rise and Fall of a Modern Ghetto (2000) explored life in Chicago public housing. He received his Ph.D. in Sociology from the University of Chicago. He was a Junior Fellow at the Society of Fellows, Harvard University from 1996-1999. He is currently Director of the Center for Urban Research and Policy, and Director of the Charles H. Revson Fellowship Program, both at Columbia University.