Earnings Functions, Specific Human Capital, and Job Matching: Tenure Bias Is Negative
研究收入函数中加入特定人力资本（如任期）时，因工作匹配效应导致的样本选择偏误，发现该偏误会低估特定人力资本和任期的回报。
This article investigates the hypothesis that when measures of specific human capital (such as job tenure) are included in earnings functions, there may be a sample selection bias because of job-matching effectsbecause workers with high unobserved match quality receive and accept high wage offers. We develop a model for wage offers in a labor market characterized by both specific human capital and job matching. The model provides a theoretical basis for empirical earnings functions containing specific capital, and it demonstrates that sample selection bias reduces the estimated return to specific human capital and tenure.