The Occupation Content of Trade
构建了追踪贸易中职业内容的新数据，按行业和职业类别衡量工人的增加值出口，发现国家初期沿广泛边际、后期沿集约边际专业化，且早期路径依赖强。
Abstract This paper develops new data to track the occupation content of trade. These data are based on measuring the value-added exports of workers cross-classified by their industry of work as well as their occupational class, in short by “task.” Countries initially specialize along the extensive margin (shifting exports of value added across industries) and later on along the intensive margin (shifting export income across occupations within industries). Path dependency is strong in the early phase of development, as new task specializations are closely related to the initial task export basket, but this dependence weakens afterwards. Leveraging the new data holds great promise in delivering deeper insights into patterns of trade, structural change, and economic development.