is the first to say that some of his topics-a study of discrimination on   The Weakest Link?-border on the trivial. But he has shown other economists just how well their tools can make sense of the real world. "Levitt is considered a demigod, one of the most creative people in economics and maybe in all social science," says Colin F. Camerer, an economist at the California Institute of Technology. "He represents something that everyone thinks they will be when they go to grad school in econ but usually they have the creative spark bored out of them by endless math-namely, a kind of intellectual detective trying to figure stuff out." -THE NEW YORK TIMES MAGAZINE, AUGUST 3, 2003             How Is the Ku Klux Klan Like a Group of Real-Estate Agents?