The economics literature identifies three effects of schooling on national income; the direct effect on the earnings of the workers who receive the schooling and the external effects on workers' earnings and on physical capital due to schooling's spillover effect on the productivity of these...

Lower ICP 2005 construction prices in developing countries increase the effect of capital on output in PWT 7.1 and 8.0 and cause negative world TFP growth during 1990-2010 in PWT 8.0. The investment data appear to be more accurate in PWT 6.3