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Short-term insurance buyers drive up cost in Mass.
The number of people who appear to be gaming the state’s health insurance system by purchasing coverage only when they are sick quadrupled from 2006 to 2008, according to a long-awaited report released yesterday from the Massachusetts Division of Insurance.

The result is that insured residents of Massachusetts wind up paying more for health care, according to the report.

“The active members subsidize some of the costs tied to those individuals who terminate within one year,’’ the report says....