High wage workers match with high wage firms: Clear evidence of the effects of limited mobility bias
利用德国社保数据，研究发现工人与企业的工资贡献正相关，证实了有限流动性偏差导致正向匹配未被观测到。
Limited Mobility Bias explains why positive assortative matching is not observed in the empirical literature. Using German social security records, we estimate the correlation between worker and firm contributions to wage equations and find that it is unambiguously positive.