s the following questions: What evidence can you find that report cards have improved quality? By what mechanisms could report cards improve reported market outcomes? Does the scarcity of scientific evidence on effectiveness of report cards matter? Could publication of performance data be advantageous to hospitals or physicians? How do report cards address information asymmetries? Would reducing information asymmetries guarantee better markets? Does it matter whether governments or private organizations produce report cards? Why are a few patient switches enough to influence market outcomes