India, Oct. 19 -- NK Singh is the chairman of the Fifteenth Finance Commission. But even this key position does not sufficiently capture the breadth of his experience, the duration of his engagement, and the importance of his interventions in India's public life and policymaking - as an Indian Administrative Service (IAS) officer who served in key positions at the Centre and in Bihar; a core member of Manmohan Singh's economic policy team which ushered in the 1991 reforms; secretary to Prime Minister Atal Bihari Vajpayee; a member of Planning Commission; a member of Parliament in the Rajya Sabha from Bihar; as the head of a committee that determined the contours of India's fiscal framework; and as an elder statesman in Indian public polic...