Steven D. Levitt is an economist. Stephen J. Dubner is a writer. They co-authored Freakonomics, a book about cheating teachers, bizarre baby names, self-dealing Realtors, and crack-selling mama’s boys. They figured it would sell about 80 copies. Instead, it has sold 4 million, in 35 languages. Then they wrote SuperFreakonomics, with stories about drunk walking, the economics of prostitution, and how to stop global warming. It hasn’t quite sold 4 million copies yet but it’s getting there. A lot of other stuff has happened too. A blog. A radio show. A movie. Lectures. Even Jon Stewart — and Beauty and the Geek. This is the place where all that stuff continues to happen. Welcome to Freakonomics.com.