The world elasticity of labor substitution across education levels

We estimate the world elasticity of substitution between labor types on a very well-known data set. Using enrollment ratios and government expenditures on education as instruments, the plausible elasticities varying from 2.00 to 3.21 for the “college-completed” definition suggests imperfect substitution between skilled and unskilled labor. Considerably higher values are found for the “secondary” and “primary-completed” definitions. Overall, the higher the threshold for defining skilled labor, the lower the elasticity and less likely is the switch between types of labor. These findings complement micro-evidence and support stronger links between productivity and output for the “college educated” labor definition.