APPROPRIATE TECHNOLOGY AND INCOME DIFFERENCES
研究了不同国家中技能与非技能工人的相对生产率，发现低收入国家工人人力资本较低且物理生产率相对更低，采用技能互补技术可大幅提升人均GDP。
This article studies the relative productivity of skilled to unskilled workers across countries. Relative productivities are broken down into the human capital embodied in skilled workers and relative physical productivities (reflecting production techniques). I find that skilled workers from poorer countries embody less human capital and are also relatively less physically productive. Furthermore, results show that production techniques are inappropriate for most low‐income countries, and these countries experience large increases in GDP per capita by increasing the relative physical productivity of skilled to unskilled workers. This suggests that there are significant barriers to the adoption of skill‐complementary technologies.