Chief Economic Advisor Arvind Subramanian will be leaving his post several months early. He has been a part of the Narendra Modi-led central government since October 2014, and his early departure will leave a serious hole in the administration's economic policy-making team. Any CEA, as Mr Subramanian pointed out in his own farewell note, occupies an ambiguous position — both in government, as a senior advisor, and out of it, as a neutral technocratic advocate for politically sensitive reform. There are essentially three parts to a CEA's job. The first is to push for suitable policy outcomes within government, and

