Professor of Industrial and Operations Engineering, University of Michigan

Distinguished Professor of Geography

Professor, Department of Geography, University of California at Santa Barbara

Professor Emeritus, Geography, The Ohio State University

University of Missouri - St. Louis (UMSL)

University of Waterloo

Professor of Environmental Systems Management, Kent Business School, University of Kent

Aerospace Information Research Institute, Chinese Academy of Sciences

University of California, Riverside

Professor of Urban Analytics, Quantitative Geographer, University of Glasgow, Scotland, UK