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.,...

This paper surveys the economic wreckage created by Wall Street's decision to manufacture and sell trillions of dollars of financial securities, which we now call toxic. And we call them toxic, not because they were risky, but because they were fraudulent. Rather than address the fundamental...