This study empirically examines cost reductions in the Japanese sew- erage industry through mergers by modeling the costs of sewage disposal. The cost model is specified in a translog form, and treats capital as a quasi-fixed input. Employing the parameters estimated by the model, the long-run...

This paper explores the structure and function of the intra-firm trade network in Mitsubishi Corporation (Mitsubishi Shoji) from 1928 to 1936. In this period, Mitsubishi Co. substantially expanded its global branch network. Using original documents of Mitsubishi Co., we obtained the data on the...