Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) IGUCHI Norio,A Study on Productivity Analysis and Price Regulation of Japanese Railway Companies,Transport Policy Studies' Review,13443348,Japan Transport and Tourism Research Institute,1998-07-31,1,1,033-038,https://cir.nii.ac.jp/crid/1390001288142954880,https://doi.org/10.24639/tpsr.tpsr_1r_04