Barnett conducts economic studies to improve the value of treatments for HIV, hepatitis C, heart disease, tobacco use, and substance use disorders. Additional research interests are the improvement of health economic methods and data and the more efficient delivery of health care.
He is a health economist and former director of the Health Economics Resource Center, the national center that supports economic research in the Department of Veterans Affairs. He serves as a health economist for the VA HSR&D Center for Health Care Evaluation, the VA Cooperative Studies Program, and the Treatment Research Center in the Department of Psychiatry at the University of California, San Francisco http://addiction.ucsf.edu/faculty/paul-g-barnett-phd. He is also Consulting Associate Professor in the Department of Health Research and Policy at Stanford University Medical School.