An Exploration of Technology Diffusion
构建了一个类似单部门新古典增长模型的聚合模型，并用166个国家两个世纪以来15种技术的扩散数据估计，发现平均采用滞后45年，且技术采用差异解释了至少25%的人均收入差距。
We develop a model that, at the aggregate level, is similar to the one-sector neoclassical growth model; at the disaggregate level, it has implications for the path of observable measures of technology adoption. We estimate it using data on the diffusion of 15 technologies in 166 countries over the last two centuries. Our results reveal that, on average, countries have adopted technologies 45 years after their invention. There is substantial variation across technologies and countries. Newer technologies have been adopted faster than old ones. The cross-country variation in the adoption of technologies accounts for at least 25 percent of per capita income differences.