Labor Specialization and the Extent of the Market
构建了一个劳动专业化的分析模型，研究工人如何根据劳动力市场规模决定人力资本投资的深度与广度，以及市场扩大如何改善工人与企业的匹配质量。
This paper presents an analytical model of labor specialization. Workers make human capital investment decisions on the depth and the breadth of their skill. Given that firms have diverse job requirements and increasing returns to scale, workers invest more for the depth of their human capital, and less for the breadth, as the size of the labor market increases. Also, the larger the size of the market, the more varieties of job requirements are used so that the average match between a worker and a firm improves. Copyright 1989 by University of Chicago Press.