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It’s actually surprising how little media attention has been given to the dominance of M.I.T.-trained economists in policy positions and policy discourse. But it’s quite remarkable. Ben Bernanke has an M.I.T. Ph.D.; so do Mario Draghi, the president of the European Central Bank, and Olivier Blanchard, the enormously influential chief economist of the International Monetary Fund. Mr. Blanchard is retiring, but his replacement, Maurice Obstfeld, is another M.I.T. guy — and another student of Stanley Fischer, who taught at M.I.T. for many years and is now the Fed’s vice chairman.