Finance Minister Arun Jaitley recollected CEA Arvind Subramanian\u2019s many contributions to India\u2019s economy in his service - which lasted for nearly four years - which ranged from conceptualising JAM (Jan Dhan, Aadhar, Mobile) database to his four widely appreciated \u201cEconomic Surveys\u201d. Arun Jaitley announced Chief Economic Advisor\u2019s resignation through a Facebook post on Wednesday, highlighting his many offerings to the economy. Subramanian had joined as the Chief Economic Advisor on 16 October 2014 for a period of three years, but continued to serve for nearly four years. Arun Jaitley noted Arvind Subramanian\u2019s input making GST a reality - arguably India\u2019s biggest indirect tax reform, saying that his report on the Revenue Neutral Rate was of great use in forging a consensus which led to the constitution amendment enabling the Goods and Services Tax. \u201cHe participated in every meeting of GST, gave his independent views and was heard in rapt attention by almost every Finance Minister,\u201d Arun Jaitley said. Pointing out the fact that the Chief Economic Advisor\u2019s job had multi-facets to it, the Finance Minister said that as an Advisor, Arvind Subramanian\u2019s job was to analyse and think several steps ahead. \u201cIt is a unique responsibility with freedom to the work that he enjoys. Arvind functioned within these parameters and concentrated on the challenges to the economy,\u201d Jaitley said. \u201cHis early diagnosis of the twin balance-sheet had led us to adopt the macro-economic strategy of higher public investment in the Budget of 2015-16. He conceptualised JAM (Jan Dhan, Aadhar, Mobile) as a database for availing public benefits,\u201d Jaitley said in his post. The Finance Minister said that CEA Subramanian contributed to the debate of federalism by conceptualising that the Indian federalism has not merely to be cooperative but also competitive. \u201cHe came out with newer ideas, policy reforms in the sectors of clothing, fertilizers, kerosene, power and pulses,\u201d said Jaitley. CEA Subramanian\u2019s four \u201cEconomic Surveys\u201d were treated by several independent critics as the \u201cbest ever produced\u201d, said Jaitley. \u201cThe latest survey had about 15 million visitors from 117 countries. The Economic Survey today is a basic teaching material all over India,\u201d Jaitley said, adding: \u201cHe thought ahead and, therefore, came out with futuristic ideas on rationalisation of removal of \u201csubsidies for the rich\u201d, universal basic income, climate change, from \u201csocialism without entry and capitalism without exit\u201d and the four C\u2019s that he had historically paralysed decision making.\u201d Jaitley wrote about Arvind\u2019s conduction of the first online course on Indian economy - online education platform \u201cSwayam\u201d - which became one of the most followed courses in India. \u201cHe travelled across the country and spoke on public platforms on economic issues to elevate the quality of public discourse. He built up a strong team of both \u201cinsiders\u201d and \u201coutsiders\u201d in the Economic Division of the Ministry,\u201d he said.