A Dynamic Demand Function Model and Case Study of the Sustainability of Brand

This article introduces the time variable to make the static theory of brand economics dynamics and builds a dynamic demand function model of the brand. The article gives a rigorous definition of brand sustainability from the perspective of normative economics. The theoretical model shows that the brand sustainability is determined by demand by the change of brand category demand intensity and brand credit degree. Based on the theoretical model the article selects a few of representative cases and studies the factors affecting the brand sustainability to enhance the application of the theoretical framework and explanatory power.