1. Indiana University, Adjunct Professor of Commerce, University of South Australia, Research Fellow, Institute for the Study of Labor (IZA) and Fellow, Center for Economic Studies and Institute for Economic Research (CESifo).
2. Stern School of Business, New York University, Distinguished Adjunct Professor at American University and External Affiliate of the Health Econometrics and Data Group at York University.
3. Emeritus of Economics, Vanderbilt University, Senior Research Fellow, University of Adelaide, South Australia, and Secretary-Treasurer of the American Economic Association.