Author of over 450 publications in the peer-reviewed medical and health policy literatures, Aaron has testified before Congress on pharmaceutical policy, medical device regulation, generic drugs, and modernizing clinical trials, is a member of the FDA Peripheral and Central Nervous System Advisory Committee, and served on a National Academies of Science, Engineering and Medicine consensus committees on addressing the opioid epidemic and bioidentical hormone replacement. At the HMS Center for Bioethics, he co-teaches a course on health policy, law, and bioethics and organizes the monthly policy and ethics consortium.