Professor N S Siddharthan retired as Professor and Head V K R V Rao Centre for Studies in Globalisation, Institute of Economic Growth (IEG), Delhi University on January 31, 2007 after spending 40 years at IEG and is currently Hon. Professor at the Madras School of Economics, Chennai and President, Forum for Global Knowledge Sharing. He was invited to occupy the Special Chair of the Province of Antwerp, University of Antwerp, for the academic year 2000 – 2001. He has also been an Academic Visitor (for 12 months) at the Queen Elizabeth House, University of Oxford.

He has conducted collaborative research with the following Institutions: Hitotsubashi University, Tokyo; Institute of Developing Economies, Tokyo; Erasmus University Rotterdam; United Nations University INTECH, Maastricht, The Netherlands; University of Toronto, Canada; Georgetown University, Washington DC, USA; University of Oxford; and University of Antwerp, Belgium.

His current research interests are: Technology and Globalisation, International Economics, Multinational Corporations, and Industrial Organization.

He has published several papers in Journals such as, The Economic Journal, Royal Economic Society UK; Oxford Bulletin of Economics and Statistics, Oxford, UK.; The Journal of Development Studies, UK; Economics of Innovation and New Technology, UK; Applied Economics, Routledge, UK; Development and Change, Journal of the Institute of Social Studies, Hague; Journal of Economic Behavior and Organization, Elsevier Science; Journal of Business Venturing, Elsevier Science; Japan and the World Economy, Elsevier Science; Journal of International and Area Studies; International Business Review, Elsevier Science; Developing Economies, The Journal of the Institute of Developing Economies, Tokyo; Weltwirtschaftliches Archiv, Journal of the Kiel Institute of World Economics, Germany; Tnansnational Corporations, Geneva; The Indian Economic Review, Delhi; The Indian Economic Journal, The Journal of the Indian Economic Association, Bombay; Sankhya, The Journal of the Indian Statistical Institute, Calcutta;

Has also published books with publishers such as Routledge, Springer, Oxford University Press, Macmillan, Allied, Academic Foundation and New Age International Publishers. Has acted as a guest editor of special issues of journals: Science, Technology and Society (Sage) and Innovation and Development (Routledge).