In the United States a growing fraction of Medicaid participants are enrolled in Health Maintenance Organizations (HMOs). The HMOs contract with physicians to provide health care services to the enrollees. Generally the physicians are compensated either via fee for service (FFS) or capitated...

This chapter reviews recent theoretical work on the design of regulatory policy, focusing on the complications that arise when regulated suppliers have better information about the regulated industry than do regulators. The discussion begins by characterizing the optimal regulation of a monopoly...