Why Do Smaller Firms Pay Less?
利用1983年美国数据，发现企业规模对工资有显著影响，而工厂规模影响很小；工人能力差异解释了约60%的工资规模效应，在25人以上企业中几乎完全解释。
This paper uses data from the National Longitudinal Survey of Young Men and the Current Population Survey for 1983 to examine the relationships among wages, firm size, and plant size. We reach three key findings. First, plant size has little independent effect on wages once we have controlled for firm size for firms with fewer than 1,000 employees. Second, we find evidence of sorting on observed and unobserved ability characteristics across firm sizes. Better educated and more stable workers are in larger firms. Third, results from a first-difference estimator indicate that about 60 percent of the wage-size effect is due to unobserved heterogeneity when all firms are considered and about 100 percent when firms with 25 or more employees are considered.