Policy economists are going back to the drawing board. The anaemic global recovery more than eight years after the North Atlantic financial crisis has led macroeconomists to either seek new prescriptions or revive old ones to get economies back on track. The political backlash in many parts of the world against inequality within nations—even as inequality at the global level has reduced because of the progress in China and India—has forced new discussions on development policy. Exhibit A: The December issue of the Finance and Development quarterly published by the International Monetary Fund has several discussions about the distributional consequences of free trade. One underlying theme in these essays is that world trade has increased global welfare at the aggregate level but there has been no structured attempt to compensate the losers in order to ensure that nobody is worse off—the classic Pareto principle of welfare economics. This comes even as the multilateral lender has alt...