THE SERVICE LEVEL OF THE TRANSPORTATION INVESTMENT AND THE PRODUCTIVITY

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  • 交通整備水準と生産性分析

Abstract

Last decade, there are many studies about the productivity related to the transportation investment in not only Japan but also several foreign countries. However, there is no common result on this issue because of differences of the measuring the service level of the transportation network and the productivity and of the using the data set among the prior studies. Thus, the purpose of this study is the establishment of the standard method to measure the productivity change from transport investment. Firstly, this study classifies previous studies from 6 points of view. These contents the analytical method, functional type of the production function, explained variable in the production function, service level of the transporta-tion network, estimation method, and aggregation level. Then this study measures the productivity of transport investments in Japan as an empirical study. From these analysis, differences in the results are made by the difference of the measuring the total factor productivity despite the same data set. So, it is important to establish the standard method to measure the service level of the transportation investment and the productivity.

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