@article{oai:nagoya.repo.nii.ac.jp:00008968, author = {李, 永俊 and LEE, Young-Jun}, issue = {3}, journal = {経済科学}, month = {Dec}, note = {Recent changes in the long-term employment policy of the Japanese firms can be characterized with a stylized fact. That is the share of long-term employment at hiring stage trends downward, while their tenure trends upward. This paper explains these changes using a simple internal dual labor markets model. The model shows that profit-maximizing firms use the promotion rate of long-term workers and their share at hiring stage as two major instruments to keep optimal hierarchical structure. Using the pooling cross-section and time series data on employment and job ranks, we find a negative relationship between these variables. We also find the recent reduction in share of long-term workers is due to the long-term deceleration, not to the short-term fluctuation of an economy. These two findings support the prediction of the model developed in this paper.}, pages = {29--46}, title = {「日本型」 長期雇用システムの変容}, volume = {51}, year = {2003} }