The Relative Efficiency of Skilled Labor across Countries: Measurement and Interpretation

I study how the relative efficiency of high- and low-skill labor varies across countries. Using microdata for countries at different stages development, document that differences in quantities wages are consistent with high-skill workers being relatively more productive rich exploit variation skill premia foreign-educated migrants to discriminate between two possible drivers this pattern: cross-country bias technology human capital skilled labor. find former is quantitatively important, discuss implications result development accounting. (JEL I26, J24, J31, J61, L16, O15)