Mary E. Deily does most of her work in the area of empirical industrial organization. She has written several papers examining the decline of the integrated steel industry. More recently, her work has focused on hospital efficiency and on the cost and quality of health care.
Professor Deily teaches applied microeconomic analysis, competitor and market analysis and regulation of industry. She has taught at Texas A&M University, was a Visiting Scholar at the Federal Reserve Bank of Cleveland, and served two years the National Science Foundation as a Director of the Economics Program.