Harold W. Eberhard Distinguished Professor of Agricultural Economics, University of Nebraska, 2014-present.
Affiliated Professor, Johnson-Shoyama Graduate School of Public Policy, University of Saskatchewan, Canada, 2010-present.
Visiting Professor, Department of Economic and Management Sciences, MAICh, Greece, 2005-2010 and 2015-present.
Visiting Professor, Mansholt Graduate School of Social Sciences, Wageningen University, The Netherlands, 2008.
Visiting Professor, Department of Economics, Politics, and Law, University of Agricultural Sciences (BOKU), Vienna, Austria, 2001 & 2002.
Courtesy Appointment, Department of Marketing, College of Business Administration, UNL, 2000-present.