従来の「傾斜生産方式」に関する研究が政策評価にとどまり、「傾斜生産方式」のポイントである鉄鋼と石炭の相互傾斜的増産体制の実態分析を欠いている。その結果、石炭鉱業にとって「傾斜生産方式」とは何か、復興期の日本経済において「傾斜生産方式」は如何に位置付けられるのかが実証的に未解明のまま残されている。本論文の目的は戦後統制期の石炭産業の全体構造を「傾斜生産方式」を中心に分析することにあった。この中では、「傾斜生産方式」が現実には二段階に展開したとする見解を示し、さらに、復興金融金庫融資、炭鉱の機械化・合理化、炭鉱労働、炭鉱の国家管理などの諸側面の実証的分析を通して、「傾斜生産方式」は第二段階から初めて労働生産性が上昇し、当初想定された増産効果が現れ始めたことを解明した。
Development of Partitioning Skills: A proposal for teaching fractions
The conventional study on "a priority production policy" is only confined to a policy evaluation and lacks in actual situation analysis of the increase in production system of the steel industry and the coal mining industry. Therefore, what is "a priority production policy" for the coal mining industry? How is "a priority production policy" evaluated in Japanese economy of the revival period? These two questions are not yet elucidated substantially. The purpose of this article was to analyze total structure of the coal mining industry of the postwar control period mainly on "a priority production policy".
I showed the opinion that "a priority production policy" presented to two phases practically. Moreover, I analyzed the many sides such as coal mine labor, state control of a coal mine, the financing system of Rehabilitation Finance Corporation, a process of the mechanization and rationalization of a coal mine substantially.
The conclusion is as follows. Though a coal increase in production was forced on the first stage of "a priority production policy" by mass injection of work force, the labor productivity was low. Production efficiency rose for the first time from the second stage, and then an increase in production effect appeared.