Sudhir Venkatesh is an award-winning author, and a noted expert on American cities, whose contribution to the internationally bestselling book Freakonomics is well known. Of all the storeys told in Freakonomics, the most popular was the section on the economics of crack cocaine and how street gangs ran their drug trade like a corporation. That storey was born from Venkatesh’s daring life researching a crack gang in Chicago over several years.Venkatesh's research focuses on cities and black market economies in the United States (New York, Chicago) and Paris, France. He has published his writings and storeys inThe American Prospect, The New York Times, and a large number of academic journals. [+]