Bocconi University and University of Chicago

Professor of Computer Science, Cornell University

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

Director, NetLab Network

University of Illinois at Urbana-Champaign

Professor, Yale University

professor of mathematical social sciences, university of california

professor of sociology, duke university

UCSD Professor

University of Groningen; University of Oxford; COSTNET CA15109