The Theory of Stochastic Preferences: Further Comments and Clarifications
澄清了随机偏好理论中参数ρ的含义，指出其可作为产品类别品牌忠诚度的度量，并强调非齐次多项模型可代表多数品牌转换模型。
The theory of stochastic preference and brand switching uses market share data and a parameter ρ for generating switching matrices. In particular, ρ facilitates the generation of different matrices for different product categories having similar market shares. The parameter ρ has been termed a measure of product class brand loyalty. Because of the numerous conceptual definitions of brand loyalty, the author provides some additional insights into the meaningful interpretation of ρ. Furthermore, he emphasizes that at a general level a nonhomogeneous multinomial model can be used to represent most of the brand switching models.