CAMBRIDGE, Mass. -- Adults who are covered by Medicaid use emergency rooms 40 percent more than those in similar circumstances who do not have health insurance, according to a unique new study, co-authored by an MIT economist, that sheds empirical light on the inner workings of health care in the U.S.
The study takes advantage of Oregon's recent use of a lottery to assign access to Medicaid, the government-backed health-care plan for low-income Americans, to certain uninsured adults. The research examines emergency room records for roughly 25,000 people over 18 months.