Visiting Fellow and Professor of Philosophy, Arizona State University

Visiting Fellow and Professor of Economic Sciences, Claremont Graduate University

Visiting Fellow and Professor of Linguistics, Massachusetts Institute of Technology

Visiting Fellow and Professor of Economics, Loyola Marymount University

Visiting Fellow and Professor of Economics and Department Head, University of Alabama

Visiting Fellow and Distinguished Professor of Philosophy, University of Southern California

Visiting Fellow and Professor of Philosophy, Washington University in St. Louis