1Dan A. Black, Brett J. Noel, Zheng Wang. On-the-Job Training, Establishment Size, and Firm Size: Evidence for Economies of Scale in the Production of Human Capital[J]. Southern Economic Journal, 1999, 66(1):82-100.
2Idson, Todd L. Employer size and labor turnover[J], Research in Labor Economics, 1996, 15:273-304.
3Holtman, Alphonse G., and Todd L,, Idson. Employer Size and On-the-job Training Decisions [J]. Sourthern Economic Journal, 1991, 58(October):339-55.