Professor Rabban served as counsel to the American Association of University Professors for several years before joining the Texas faculty in 1983. He has served as General Counsel of the AAUP since 1998. His teaching and research focus on labor law, higher education and the law, and American legal history. He is best known for his path-breaking work on free speech in American history. He is the author of Free Speech in Its Forgotten Years, 1870-1920 (Cambridge,1997), which received the Forkosch Prize from the Journal of the History of Ideas for "the best book in intellectual history published in 1997." His many articles have appeared in Yale Law Journal, Stanford Law Review, University of Chicago Law Review and elsewhere. He was a fellow at the Woodrow Wilson International Center for Scholars in Washington, D.C. in 1994-95, and has also been a Visiting Professor at the University of Michigan Law School.