Expanding coverage to the forty-seven million Americans who now lack health insurance could greatly improve care for people who already are protected, according to a new study in the September-October issue of Health Affairs. Economists Mark Pauly of Wharton and José Pagán of the University of Texas-Pan American found that insured adults who live in communities with high uninsurance rates are more likely to face problems with access to care and quality than those who live in communities where more people are covered.

The Sep/Oct Health Affairs is a thematic volume focusing on vulnerable populations and health. The issue, titled “Caring For The Vulnerable,” was supported by a grant from the Robert Wood Johnson Foundation. It was released at a Tuesday, Sept. 11, briefing featuring Katherine Baicker of Harvard, Gregg Bloche of Georgetown, Nicole Lurie of Rand, and Thomas Miller of the American Enterprise Institute.