1985 年 1985 巻 359 号 p. 51-59
There are many studies associated with economic benefits derived from the development of transportation facilities. Major problems of these studies are summarized as follows, a) Interest groups are not always cleary defined. It must be clarified that the project benefits attribute to whom (where, when and how much). b) Estimated value isn't imputed explicitly to the facilities. Transportation facilities such as port and road will generate economic benefits combined with production factors (labour and capital). Then, economic benefits must be estimated as a imputed value among these production factors. c) Applicability of the proposed methods have limitations on scale as well as the type of projects. To solve the above problem, benefits are estimated as value added in every intersection of cargo flow. The concept of negative average productivity is applied to measure a imputed value added at each section. Through a case study, the validity of the methodology and the model is confirmed.