When people cheat on Wall Street

Marketplace: "Here's the story. We ran this at Carnegie Mellon, in Pittsburgh. And in Pittsburgh there are two universities: Carnegie Mellon, University of Pittsburgh. All the students who participated were Carnegie Mellon students. If the cheating student, the acting student, was wearing a Carnegie Mellon sweatshirt, he basically got people to cheat more. But if he was wearing a University of Pittsburgh sweatshirt, he got people to cheat less."