John Barkley Rosser Jr. is a mathematical economist and Professor of Economics at James Madison University in Harrisonburg, Virginia, US. He is known for work in nonlinear economic dynamics, including applications in economics of catastrophe theory, chaos theory, and complexity theory. He joined the economics department at JMU in 1977, and was appointed Professor of Economics in 1988 and Kirby L. Cramer Jr. Professor Business Administration in 1996. He has published several books and over 200 journal articles, book chapters, and book reviews in a wide variety of sub-fields of economics. He served as Editor of the Journal of Economic Behavior and Organization from 2001–2010. In 2012 he became Founding Editor-in-Chief of the Review of Behavioral Economics. As of 2018, he is also Coeditor of the New Palgrave Dictionary of Economics, 4th edition.