After spending most of his career focusing on antitrust, regulation and legal ethics, Rose changed direction. His primary scholarly interests now involve medieval and early modern English legal history, and his research focuses on the history and regulation of the legal profession and the operation of the medieval legal system. He also has written on early defamation law, medieval prisons, and the historiography of legal history. Rose, who joined the faculty in 1968 and was an Associate Dean from 1987-90, teaches Legal History, Antitrust, Contracts and Legal Ethics, and has received numerous teaching awards. He also is a Faculty Affiliate of the Arizona Center for Medieval & Renaissance Studies at ASU.