1979, Master's in Economics, Delhi; MPhil and PhD in Economics, University of Oxford. With GATT-WTO Secretariat: 1985-89, Economic Research and Analysis Unit; 1989- 91, Trade Policy Review Division; 1991-95, Rules Division; 1995-96, Trade, Environment and Technical Barriers to Trade Division; 1996-97, Office of the Director-General, WTO. With Telecom Regulatory Authority of India: 1997-2001, Economic Adviser; 2001- 05, Secretary; 2005-13, Deputy Director General, WTO; since 2013 October, current position. Former Chair, dispute settlement panels, WTO. Member, various trade advisory committees. Adjunct Professor, SIPA, Columbia and Fletcher School. Honorary Professor, Council for Research on International Relations. Author of papers.