第3セクター鉄道の技術効率性-「第3セクター」という経営形態の考察-
2003 年 34 巻 1 号 p. 57-69
詳細
2003 年 34 巻 1 号 p. 57-69
The purpose of this paper is to measure technical efficiencies and scale economies in joint public-private venture railways and small and medium-sized private sector railways and to test the hypothesis that two groups (Group 1 is joint public-private venture railways and Group 2 is small and medium-sized private sector railways.) belong to the same population. Joint public-private venture railways mean the railway companies that are funded by local governments and private companies. We use data envelopment analysis (DEA) to measure technical efficiencies and scale economies. We apply the Mann-Whitney test to test the hypothesis. We derive the following results:
1. The mean efficiencies of CRS model obtained from pooling data, Group 1, and Group 2 are 55%, 52%, 58% respectively. The mean efficiencies of VRS model obtained from pooling data, Group 1, and Group 2 are 72%, 68%, 75% respectively.
2. The results obtained from DEA indicate increasing returns to scale in many railway companies.
3. The null hypothesis that the efficiencies of Group 1 and Group 2 have the same distribution is accepted.
