The Affordable Care Act (ACA) was landmark legislation when it was enacted by the federal government in 2010. The changes introduced through the ACA were vast and significant, although some of them have been difficult to measure. The latest research by Wharton health care management professor Atul Gupta aims to correct that by quantifying some of the health outcomes of the bill. In a paper titled, “Estimating Effects of Public Insurance Expansion for Adults: Evidence from California Hospitals,” Gupta and colleagues Mark Duggan and Emilie Jackson, both of Stanford University, analyze data gathered from hospitals and emergency rooms in California from 2008 to 2015. He recently spoke with Knowledge at Wharton about what the researchers found. An edited transcript of the conversation follows. Knowledge at Wharton: Your paper looks at the effects of the Affordable Care Act through the lens of what’s been going on in California. Tell us about what you studied.…