health economics
Health economics is a branch of economics concerned with issues related to scarcity in the health markets.
The five health markets typically analyzed are:
* Healthcare Financing market
* Physician services market
* Institutional services market
* Input factors market
* Professional education market
Topics related to various aspects of health economics include the meaning and measurement of health status, the production of health and health care, the demand for health and health services, health economic evaluation, health insurance, the analysis of health care markets, health care financing, and hospital economics.
Health Markets
Although assumptions of textbook models of economic markets apply reasonably well to health care markets, there are important deviations. Insurance markets rely on risk pools, in which relatively healthy enrollees subsidize the care of the rest. Insurers must cope with "adverse selection" which occurs when they are unable to fully predict the medical expenses of enrollees; adverse selection can destroy the risk pool. Features of insurance markets, such as group purchases and preexisting condition exclusions are meant to cope with adverse selection.
Insured patients are naturally less concerned about health care costs than they would if they paid the full price of care. The resulting "moral hazard" drives up costs, as shown by the famous RAND Health Insurance Experiment. Insurers use several techniques to limit the costs of moral hazard, including imposing copayments on patients and limiting physician incentives to provide costly care. Insurers often compete by their choice of service offerings, cost sharing requirements, and limitations on physicians.
Consumers in health care markets often suffer from a lack of adequate information about what services they need to buy and which providers offer the best value proposition. Health economists have documented a problem with "supplier induced demand", whereby providers base treatment recommendations on economic, rather than medical criteria. Researchers have also documented substantial "practice variations", whereby the treatment a patient receives depends as much on which doctor they visit on what their condition is. Both private insurers and government payers use a variety of controls on service availability to rein in inducement and practice variations.
The U.S. health care market has relied extensively on competition to control costs and improve quality. Critics question whether problems with adverse selection, moral hazard, information asymmetries, demand inducement, and practice variations can be addressed by private markets. Competition has fostered reductions in prices, but consolidation by providers and, to a lesser extent, insurers, has tempered this effect.
