TESFA G. GEBREMEDHIN is an Associate Professor of Agricultural Economics in the Division of Resource Management at West Virginia University. Dr. Gebremedhin has written book chapters, a number of jourbanal articles, experiment station bulletins, research reports, and extension publications.

LUTHER G. TWEETEN is the Anderson Professor of Agricultural Marketing, Policy, and Trade in the Department of Agricultural Economics and Rural Sociology at the Ohio State University. Dr. Tweeten was previously Regents Professor at Oklahoma State University. He has published eight books and over 400 jourbanal and miscellaneous articles, experiment station bulletins, and research reports.