Peter H. Lindert is Distinguished Professor of Economics at the University of California, Davis. His books include Growing Public: Social Spending and Economic Growth since the Eighteenth Century. He lives in Davis, California. Jeffrey G. Williamson is the Laird Bell Professor of Economics, emeritus, at Harvard University. His books include Trade and Poverty: When the Third World Fell Behind. He lives in Madison, Wisconsin. Both are research associates at the National Bureau of Economic Research.