The number of people eligible for Medicaid who remain uninsured varies from state to state, according to the authors. But the federal health law is likely to increase the rate of enrollment for this group. The potential impact of this increase in Medicaid enrollment, also known as the ‘welcome-mat’ effect, is unclear.

Source: Research roundup: 'Welcome-mat' effect of Medicaid expansion; Setting up shops; California's transition to Medicaid managed care