When former Senator George Mitchell finally released his report on performance-enhancing drugs in Major League Baseball last December many of its conclusions came as no surprise to baseball fans most of whom had heard the allegations of steroid use for years. With fans aware of such egregious behavior why has attendance at games continued to climb? Are baseball’s ”consumers” impervious to ethical lapses?  No say Wharton professors but the case demonstrates how bias competition and a lack of oversight can work together to create an ethically toxic atmosphere -- in any field.