Maddison's 1870-1979 data are analyzed, showing the historically unprecedented growth in productivity, gross domestic product per capita and exports and the remarkable convergence of productivities of industrialized market economies, with convergence apparently shared by planned economies but not less developed countries. Productivity lag's relation to "deindustrialization," unemployment, and balance of payments is examined. The data are shown to suggest a tempered view of the slowdown in U.S. productivity growth and its lag behind other countries.