Labor Market Models of Worker and Firm Heterogeneity
综述了企业规模、生产率和平均工资的持续差异及其正相关关系，探讨了就业重新配置的效率收益、工人寻求高薪雇主的动机以及异质性带来的分类匹配问题。
Microeconomic data on individual firms and employer-employee matches reveal substantial and persistent dispersion in firm size, productivity, and average wage paid and a positive correlation between each pair. To the extent that intrinsic differences in firm productivity explain these facts, there are several important consequences. First, the reallocation of employment from less to more productive firms will yield efficiency gains. Second, workers will find it in their interest to seek out higher-paying employers. Recent research has provided support for both hypotheses. Third, the existence of worker and employer heterogeneity offers possible gains from sorting. However, because the problem of identifying the presence of sorting is model dependent, it is too early for conclusions about its significance.