This classroom experiment introduces students to the concept of double marginalization, i.e., the exercise of market power at successive vertical layers in a supply chain. By taking on roles of firms, students determine how the mark-ups are set at each successive production stage. They learn...

Every experimentalist will sooner or later come across a situation in which results from initial baseline treatments conform nicely to the Nash equilibrium, but subsequent changes in parameters push the data in ways not predicted by Nash. This may happen when one begins by giving theory its best...