Managed Care: Past Evidence and Potential Trends

Enrollment in network-based managed care plans has grown rapidly, raising important questions about the actual impact of different types of managed care plans on health care use, expenditure, and quality of care. In this article, we analyze the literature on the performance of managed care plans relative to fee-for-service plans. We find strong evidence that staff- and group-model HMOs have lowered utilization and expenditure relative to...