http://harvardmagazine.com/2015/08/cowboy-doctors-and-health-costs

WHO’S DRIVING UP U.S. healthcare costs? A recent study by Harvard professors and colleagues revealed that the culprits may be “cowboy doctors”—physicians who provide intensive, unnecessary, and often ineffective patient care, resulting in wasteful spending costing as much as 2 percent of the nation’s Gross Domestic Product—hundreds of billions of dollars annually