Way back in the 1990s, economist Dipak Banerjee had introduced a new word to a bunch of young students of the Centre For Studies in Social Sciences in Calcutta: “polyphony,” or music where many notes and melodies play out simultaneously. It was his way of teaching. He would draw on musical analogies to break down economic processes. With his son, Abhijit Banerjee, winning the world’s most glorious award, the Nobel Prize, the memory of his classes comes alive. For, ironically, it is polyphonic economics that has got a shot in the arm with the Nobel announcement.