We examine how to procure health care services at minimum cost while preventing suppliers from refusing to care for high-cost patients. A single risk-adjusted prospective payment is optimal only when it is particularly costly for the supplier to discover likely treatment costs. Cost sharing is...

We analyze the optimal behavior of an organization when its employees can manipulate the organization's accounting system to their private advantage. We find that the organization may benefit by helping its employees manipulate the system. This help can reduce the employees' private returns from...