Profesor of Management, Emeritus, The Wharton School, U. of Pennsylvania

University of California, Davis

Professor of Anthropology, Arizona State University

Professor in Computer Science, Royal Holloway

CNRS, ARTIS International, University of Oxford, University of Michigan

City University of New York

Professor of Demography and Economics, Univ Calif Berkeley

Professor Emeritus of Ecology & Evolutionary Biology, U. of Toronto

Professor of Theoretical Biology, Oxford University

Professor, Political Science, University of Colorado