He received his A.B. degree from Princeton University, his J.D. and a masters degree in public affairs from the University of Texas at Austin, and his Ph.D. (economics) from the Massachusetts Institute of Technology. After law school he clerked for U.S. District Judge Barefoot Sanders in the Northern District of Texas and worked for two years at Texas Rural Legal Aid in Hereford and Plainview, Texas.

Professor Morriss is the author or coauthor of more than forty book chapters and scholarly articles, and he is the co-editor of Cross-Border Human Resources, Labor and Employment Issues: Proceedings of the New York University 54th Annual Conference on Labor (with Samuel Estreicher); Property Stories (with Gerald Korngold); and The Common Law and the Environment (with Roger Meiners). He is the author of the book, Regulation by Litigation (with Bruce Yandle and Andrew Dorchak), and he also regularly writes for The Freeman: Ideas on Liberty and Books & Culture: A Christian Review.

Professor Morriss was recently named one of the Reporters for the Restatement of Employment Law by the American Law Institute (ALI), Senior Fellow for the Institute for Energy Research, and a Reporter for the Restatement of Employment Law by the American Law Institute.