HCCI's research on geographic variation in health insurance spending in the employer-sponsored health insurance population was cited in Bloomberg Opinion. 

From the article: "A new study from the Health Care Cost Institute in Washington has found a similar dynamic for employer-sponsored insurance: When a beneficiary moves to an area with 10% higher health-care spending, that person's spending rises 4%. The change is caused by differences in both price and utilization of services. Moving to an area with 10% higher health-care prices raises spending by 5%, and moving to an area with 10% higher health-care utilization (which may not be a place with higher prices) raises spending by 4%."