Faculty of Management, Universiti Teknologi Malaysia

Professor at Resource and Environmental Economics, Bogor Agricultural University

US Forest Service (retired) and Duke University

Professor, College of Economics and Management, Beijing University of Technology

Professor of Economics, Iowa State University

University of Chinese Academy of Sciences

Associate Professor, Cornell University

Karakoram International University Gilgit, Pakistan

Dean and Professor, Indiana University

Professor of Applied Economics, University of Ghana, Legon, Accra, Ghana