In a surprising faceoff Thursday between two of the world's most prominent central bankers, former Federal Reserve Chairman Ben Bernanke shot back at one of his most prominent critics in monetary policy circles: India's central bank chief, Raghuram Rajan.

Speaking at a Brookings Institution panel discussion in Washington, D.C., Rajan repeated his position that the world's most powerful central banks should pay more attention to how their policies affect other countries, calling for "better coordination."