What’s driving medical-care spending growth?

Medical-care expenditures have been rising rapidly and now represent almost one-fifth of all U.S. economic activity. An analysis of the privately insured health-care market from 2003 to 2007 indicates that higher prices for medical services contributed largely to nominal spending growth, but did not greatly exceed general overall inflation. In addition, the quantity of services consumed per episode of treatment did not grow during this period. Instead, most of the rise in inflation-adjusted medical-care spending reflected a higher percentage of insurance enrollees receiving treatment.