Columbia University, Graduate School of Business
John A. Howard Professor of Business, 2008-Present
Chair of Marketing Division, 2006-2009
Member School Executive Committee, 2006-Present
Professor, 1999-2008
Associate Professor, 1993-1998.
Assistant Professor, 1987-1989, 1992.
New York University, Stern School of Business
Visiting Professor, 2005-2006.
The Hong Kong University of Science and Technology
Visiting Associate Professor, Spring 1997.
University of Tunis, Faculte des Sciences Economiques de Tunis
Assistant Professor, 1990-1991.