This paper studies a mechanism-design problem involving a principal-supervisor-agent in which collusion between supervisor and agent can only occur after they have decided to participate in the mechanism. We show how collusion can be eliminated at no cost via the use of a mechanism in which the...

In a 1-year randomized controlled trial involving thousands of university students, we provide real-time private feedback on relative performance in a semester-long online assignment. Within this setup, our experimental design cleanly identifies the behavioral response to rank incentives (i.e.,...

We look at imperfectly competitive markets where some consumers might be budget constrained. The set of budget constrained consumers varies endogenously with price. While the presence of such consumers reduces aggregate demand, we find that the equilibrium price under budget constrained demand...