We find evidence that Massachusetts’ individual mandate induces uninsured residents to conceal their true insurance status. Even setting that source of bias aside, we find the official estimate reported by the Commonwealth almost certainly overstates the law’s impact on insurance coverage, likely by 45 percent. In contrast to previous studies, we find evidence of substantial crowdout of private coverage among low-income adults and children. The law appears to have compressed self-reported health outcomes, without necessarily improving overall health. Our results suggest that more than 60 percent fewer young adults are relocating to Massachusetts as a result of the law. Finally, we conclude that leading estimates understate the law’s cost by at least one third, and likely more.
Full Cato study by Alan Yelowitz and Michael F. Cannon.
