An AHASTAT blog post today takes issue with a recent report that attempts to link hospital prices and concentration based on commercial claims data from just three insurance companies, including one with only 30% of its enrollment mix in commercial products. “The paper is badly flawed and the assertions made about hospital market structure and prices, in particular, should be viewed as unreliable for a number of reasons,” writes Melinda Reid Hatton, AHA general counsel and senior vice president. “The data used are old (2008-2011) and predate the effects of public and some private payers shifting to value-based payments.” For a more in-depth analysis on the report by a leading health care economist, click here.