Human Capital and Growth
构建了一个增长模型，其中人力资本积累可以解释所有观察到的增长，并通过人口普查收入数据验证了模型与个体生产率证据的一致性。核心假设是，与更有生产力的人互动能学到更多。
This paper describes a growth model with the property that human capital accumulation can account for all observed growth. The model is shown to be consistent with evidence on individual productivities as measured by census earnings data. The central hypothesis is that we learn more when we interact with more productive people.