From the summary: "Understanding the effects of changes in health insurance policies on the demand for health care services is an important and timely topic. As the Military Health System (MHS) has evolved over time, it has begun to adopt cost-containment strategies that have been tested in private health plans. These strategies have led to changes in many aspects of the health care services offered to Department of Defense (DoD) beneficiaries. Each change potentially can affect the number of people accessing services, the intensity of use, and the cost to the DoD. The goal of this report is to summarize the research relevant for considering the effects of policy changes on the demand for DoD health care services and associated costs."