Affiliated Faculty

John Bitzan, Ph.D.

Associate Dean, College of Business
Professor, Management

John Bitzan is an affiliate of the NDSU Center for the Study of Public Choice and Private Enterprise (PCPE), Associate Dean of the College of Business at NDSU, and Professor of Management.  His research focuses on transportation economics, transportation industry structure and performance, and the impacts of regulatory change and policy changes in the transportation industries.  Bitzan’s research has been published in the Journal of Law & Economics, Southern Economic Journal, Applied Economics, the Journal of Transport Economics and Policy, and other refereed and non-refereed publications.  He has co-edited two books in Airline Economics and one in Transportation Policy and Regulation.  He is Associate Editor of the Journal of the Transportation Research Forum and Executive Vice President of the Transportation Research Forum.


Ph.D. Economics, University of Wisconsin-Milwaukee, 1997
M.A. Applied Economics, Marquette University, 1989
B.A. Economics, St. Cloud State University, 1987


Office: Barry Hall 102F
Phone: 701-231-8949

Jay Leitch, Ph.D.

Emeritus Dean, College of Business
Emeritus Professor, Agricultural Economics

Jay Leitch is an affiliate of the NDSU Center for the Study of Public Choice and Private Enterprise (PCPE), Emeritus Dean of the NDSU College of Business, and Distinguished Emeritus Professor of Agricultural Economics.  His research focuses on natural resources and environmental economics and policy, public finance, strategic planning, benefit/cost analysis, international business, and national security.  Leitch has over 600 publications, including books, book chapters, scientific journal articles, monographs, bulletins, videos, software, and articles in the popular media.  He has 30 years of university-level teaching experience and served as the supervisory committee chair for 50+ master's students and three doctoral graduates. 


Ph.D. Applied Economics, University of Minnesota, 1981
M.S. Natural Resource Management, North Dakota State University, 1976
B.A. Political Science and Geography, Minnesota State University-Moorhead, 1974


Office: Barry Hall

David Ripplinger, Ph.D.

Director, Bioenergy and Products Innovation Center
Assistant Professor, Agribusiness and Applied Economics
Bioproducts and Bioenergy Economics Specialist, NDSU Extension

David Ripplinger is an affiliate of the NDSU Center for the Study of Public Choice and Private Enterprise (PCPE), Director of the Bioenergy and Products Innovation Center, Assistant Professor of Agribusiness and Applied Economics, and Bioproducts and Bioenergy Economics Specialist with NDSU Extension.  In these roles, he conducts economic and environmental research and provides support to farmers, entrepreneurs, established businesses, and policy makers.  Ripplinger's research has been published in the Journal of Agricultural and Applied Economics, American Journal of Agricultural Economics, Biomass and Bioenergy, Agricultural and Resource Economics Review, and other refereed and non-refereed publications. You can find out more about Dr. Ripplinger's work at


Ph.D. Transportation and Logistics, North Dakota State University, 2012
M.S. Agricultural Economics, Iowa State University, 2003
B.S. Agricultural Economics, North Dakota State University, 2001


Office: Barry Hall 614D
Phone: 701-231-5265

Clay Routledge, Ph.D.

Professor, Health/Social Psychology

Clay Routledge is an affiliate of the NDSU Center for the Study of Public Choice and Private Enterprise (PCPE) and professor of psychology at North Dakota State University. Much of his work focuses on the human need to find and maintain meaning in life. More specifically, using a range of empirical methods, his research examines the underlying cognitive processes involved in meaning-making, the different ways people seek meaning, how the presence or absence of meaning influences psychological wellbeing, self-control, and goal pursuit, and the role meaning plays in people’s ability to overcome personal vulnerabilities and difficult life experiences. Dr. Routledge is an award-winning scholar who has published over 100 academic papers and co-edited two books. He authored the books Nostalgia: A Psychological Resource and Supernatural: Death, Meaning, and the Power of the Invisible World.  He was also the lead author for the TED-Ed animated lesson Why Do We Feel Nostalgia? You can find out more about Dr. Routledge’s work at


Ph.D. Psychology, University of Missouri - Columbia, 2005
M.A. Psychology, University of Missouri - Columbia, 2003
B.A. Psychology, Missouri Southern State University, 1999


Office: Minard Hall 134D4
Phone: 701-231-8622



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