Columbia University School of Professional Studies

Lecturer at Columbia University School of Professional Studies

Mendoza College of Business

Associate Professor at Mendoza College of Business

Columbia Business School

Leonard N. Stern School of Business

Vincent C. Ross Professor of Accounting at Leonard N. Stern School of Business

Paul M. Montrone Professor of Private Enterprise in the Faculty of Business at Columbia Business School

Brookings Institution

Nonresident Fellow - Global Economy and Development, Center for Universal Education at Brookings Institution

NUS Institute of Systems Science

Provost''s Chair, Professor of Real Estate and Finance at NUS Institute of Systems Science

ESSEC

Professor, Marketing Department at ESSEC

ESSEC

Professor, Finance Department at ESSEC

EMLYON Business School

PROFESSOR OF STRATEGY at EMLYON Business School

Harvard Medical School

Chief, Division of Emergency Preparedness at Harvard Medical School

Rotman School of Management

Associate Dean, Faculty McCutcheon Professor of International Business”Professor of Strategic Management at Rotman School of Management