Sanjay Kumar co-editor (With Christophe Jaffrelot) Rise of the Plebeians? The Changing Face of Indian Legislative Assemblies and co-author (with Peter R de Souza and Sandeep Shastri) Indian Youth in a Transforming World: Attitudes and Perceptions, is a Fellow at the Centre for the Study of Developing Societies (CSDS). He is also the Deputy Director of Lokniti, a Research Program of CSDS. He has directed various National and State level studies conducted by the CSDS, which includes, the National Election Studies, (NES) 1998, 1999, 2004, and 2009, various round of bi-annual survey “State of the Nation Survey” (SONS) and various State level studies. He also directed a benchmark study in Delhi "Delhi Survey 1998 and 2003".

He had been the country coordinator (India) for the State of Democracy in South Asia (SDSA) a study conducted in five South Asian countries (India, Pakistan, Bangladesh, Sri Lanka and Nepal). He had been core team member of the Asian Barometer survey, led by Prof, Takashi Inoguchi of Cho University, Tokyo and co-director (with Krishan Hachhettu).of the survey State of Democracy in Nepal. As a survey expert, he assisted the Asia Foundation’s survey undertaken in Afghanistan in year 2006. He had also been an International Election Observer in Thailand (2007) and in Cambodia (2008).

He is also one of the leading political analyst and political commentator on both Hindi and English Television. He also writes regularly for both Hindi and English newspapers.

	Rise of the Plebeians? The Changing Face of Indian Legislative Assemblies. Edited by Christophe Jaffrelot and Sanjay Kumar. New Delhi: Routledge, in association with CSH, New Delhi, CERI & CNRS, Paris and CSDS, Delhi; 2009
	(with Peter R deSouza and Sandeep Shastri) Indian Youth in a Transforming World: Attitudes and Perceptions, Sage, New Delhi; 2009

	(With Krishna Hachhethu and Jiwan Subedi) “Nepal in Transition: A Study of the state of Democracy” International Institute for Democracy and Electoral Assistance (IDEA) Nepal, January 2008
	"Study of Political Systems and Voting Behaviour of the Poor in Orissa" A Report Submitted to the Department for International Development (DFID) New Delhi.
	(With V.B.Singh, Yogendra Yadav, E.Sridharan & Sanjay Mishra) "National Election Audit, 1999" A report submitted to The Election Commission of India on Election Expenditure in the Thirteenth General Election to the Lok Sabha, New Delhi.

	Regional Parties, Coalition Government and Functioning of Indian Parliament: The Changing Patterns, in Towards an Inclusive India, Role of Parliament in Social Change edited by G.Gopa Kumar, Manak Publications, 2011
	(With Annapurna Nautiyal) "Uttarakhand: The Story behind Marginal Differences, published in" Electoral Politics in Indian States, Lok Sabha Elections 2004 and Beyond edited by Sandeep Shastri, K.C Suri and Yogendra Yadav, Oxford. 2009
	(With Harishwar Dayal) " Jharkhand: Revival of Past Trends, published in " Electoral Politics in Indian States, Lok Sabha Elections 2004 and Beyond edited by Sandeep Shastri, K.C Suri and Yogendra Yadav, Oxford. 2009
	Change and continuity among Urban Indian Families, in Takashi Inoguchi, edited "Human Beliefs and Values in Incredible Asia, Akashi Shoten Co. Ltd. Japan, April 2008
	India Shining: Impact of Economic Reforms on Indian Elections in Bhupinder Brar, Ashutosh Kumar and Ronki Ram Edited "Globalisation and the Politics of Identity in India" Pearson Longman, Delhi, 2008

	Patterns of Political Participation, Economic and Political Weekly, September 26- October 2, 2009.
	(With Rakesh Ranjan) Bihar: Development Matters, Economic and Political Weekly, September 26- October 2, 2009.
	Religious Practices among Indian Hindus, Japanese Journal of Political Science, September 2009, published by Cambridge University Press, Cambridge, U.K
	Electoral Patterns in Indian Elections, South Asian Journal, July-September, 2009
	Youth and Political Participation: Lok Sabha Election 2009, Journal of Polity and Society, Department of Political Science, University of Kerala, Vol.2 Issue 1, January-June, 2009