retired Professor for Behavioural Biology, University of Vienna

University College Groningen, Groningen Center for Social Complexity Studies

Researcher, National Autonomous University of Mexico

New England Complex Systems Institute and UMass Dartmouth

Booth School of Business, University of Chicago

Professor of Management, Robert Willumstad School of Business, Adelphi University

Professor of Archaeology, University of Pretoria

Tecnologico de Monterrey

George Mason University

Archaeology, University of Cambridge