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How Not to Research ACOs
The Health Care Blog

In Part I of this series I noted that we have almost no useful information on what ACOs do that affects cost and quality. I described two causes of that problem: The amorphous, aspirational “definition” of ACOs, and the happy-go-lucky attitude toward evidence exhibited by ACO proponents and many analysts. I showed how the flabby “definition” of ACO makes it impossible to operationalize this thing – to reduce it to testable components. And I asked why the health policy community let ACO proponents get away with such a vague description of the ACO.

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