Workers, Machines, and Economic Growth
分析了一个经济增长模型，其中技术创新减少劳动力需求但增加资本需求。模型显示，这类创新只在生产率高的国家被采用，并显著放大国家间的生产率差异，有助于理解人均产出的国际差异。
This paper analyzes a model of economic growth, with technological innovations that reduce labor requirements but raise capital requirements. The paper has two main results. The first is that such technological innovations are not everywhere adopted, but only in countries with high productivity. The second result is that technology adoption significantly amplifies differences in productivity between countries. This paper can, therefore, add to our understanding of large and persistent international differences in output per capita. The model also helps to explain other growth phenomena, like divergence or periods of rapid growth.