Dept. of Management, University of Kentucky, LINKS Center for Social Network Analysis

Distinguished Professor of Cognitive Science, University of California, San Diego

Professor of Computational Biology, Biozentrum, University of Basel

Professor of Psychology, Carnegie Mellon University

Universidad de Sevilla

IBEB, Faculty of Science, University of Lisbon

Professor of Geology, University at Buffalo

University of Bradford

Senior Lecturer, University of Sheffield

Emeritus professor, University of Pisa