Our findings in the present paper may be briefly summarized as follows:
1) At all age levels, the tendency is quite strong for workers to be recruited within the same industrial category.
2) From various points of view, S and B form highly compact markets. This implies that it is meaningful to treat them independently from other markets.
3) The interflow of labor from agriculture (A) to manufacturing (M) sectors seem most frequent on inter-generation level. The interaction between M and C (service sector), on the other hand, is mostly confined to either white-collar or managerial workers of relatively large firms.
4) With respect to the interactions among manufacturing labor, one may argue that blue-collar workers seldom mix with white-collar workers.
5) In terms of Japan-U.S. comparison, there seems to be a moderate degree of similarity in the pattern of labor flows among industries. However, the general level of labor mobility in Japan is much lower than that in the United States.
6) Finally, our findings do not contradict with the hypothesis that the manufac-turing labor market is divided into two parts; in fact, M1 is the most self-contained group from which an upward transfer is comparatively difficult, although one cannot claim the reverse. One might even make a case for treating the workers in small firms to be somewhat heterogeneous from those in larger companies. This impression is reinforced when one remembers that small-firm workers have fairly high inclination to become petit bourgeoisie and that the latter have shown a very singular behavior. Nonetheless, it seems yet premature on the basis of our data to affirm that mobility in the market has been hindered by some institutional forces. There is no particular indication, for instance, that the interflows between large- and medium-sized firms have been prohibitive. The impact of a highly elastic supply of labor has been most influential in damping the general level of labor mobility rather than in creating obstacles to certain types of labor mobility.
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