Medicare Advantage has cost Medicare $282.6 billion in excess payments, most of them over the past eight years.

That’s according to a new study released today and that will be published in the International Journal of Health Services.

The article was written by Ida Hellander, Stephanie Woolhandler and David Himmelstein.

MIT economist Jonathan Gruber was at the National Press Club in Washington, D.C. last week.

Gruber is one of the key architects of both Romneycare and Obamacare.

(“Make no doubt,” Gruber says. “Romneycare was the model for Obamacare.”)