The best dataset on American health care will be harder to access

Prachi Sanghavi, a health-policy researcher at the University of Chicago, studies whether ambulances that provide medical care at the site of the emergency are better than basic ones that simply rush a patient to the hospital. (They are not.) She also studies whether the federal government’s rating system for nursing home quality is any good. (That’s a no, too). Her research helps Americans evaluate the country’s health-care practices. Unfortunately her work is now at risk.