This paper reports an exercise in adversarial collaboration. An adversarial collaboration is an investigation carried out jointly by two individuals or research groups who, having proposed conflicting hypotheses, seek to resolve the issue in dispute. The experiment reported was designed to...

The assumption that utility is always maximized allows often surprising inferences about the nature of the desires that guide people's ever-rational choices. This methodology has had many uses and undeniably has charm for economists, but it rests on the shaky foundation of an implausible and...