Earnings Dynamics, Inequality, and Firm Heterogeneity
研究了意大利私营部门中企业效应对个人收入动态的影响，发现年轻时期企业和工人异质性对收入不平等的贡献相当，但生命周期中工人因素占主导，且工人-企业匹配和隔离是重要机制。
ABSTRACT Studies of individual earnings dynamics typically overlook firm heterogeneity, while worker and firm decompositions of earnings inequality often neglect the life cycle. We study firm effects in individual earnings dynamics for the Italian private sector population, using the covariance structure of co‐worker earnings for identification. We allow for dynamics of both worker and firm effects, as well as worker‐firm sorting and worker segregation. When workers are young, firm and worker heterogeneity explain similar shares of earnings inequality; however, over the life cycle, workers account for most of the inequality. Sorting is substantial, especially among younger workers. Segregation accounts for most of the earnings inequality between firms.