2019 年 29 巻 1 号 p. 20-26
Ranking systems are often based on a weighted sum of several quantitative variables. We discuss how to determine the weight. Anatural weighting method is standardization. Other possibilities are principal component analysis and factor analysis. The author recently proposed an objective general index as a different way of weighting. In this paper, we study a relationship between the objective general index and the existing methods.