ECONOMIES OF SCOPE AND CONCENTRATION OF DIFFERENTIATED STORES
用博弈论的一维空间竞争模型，分析寡头商业企业选址行为，发现消费者多样化偏好导致范围经济，市场集群是均衡结果，且商品价格较高。
Geographic clusters of commercial enterprises have become a new landscape in the development of China’s market economy in the 21st century. In this paper, the location selection behavior of oligopolistic commercial enterprises is analyzed by using a one-dimensional spatial competition model based on the game theory. The economic mechanisms of spatial concentration of commercial enterprises providing differentiated products are explored. Under the circumstances that consumer has diverse preferences, the market demands of differentiated commercial enterprises are interlinked, which leads to economies of scope in the location decision-making of commercial enterprises. It is proved that market cluster is the equilibrium outcome of commercial enterprises’ reaction to consumers’ shopping behavior. It is also found that the commodity prices are relatively higher in equilibrium. Our model not only reveals the formation mechanisms of market cluster, but also can be applied to many phenomena relating to market clusters.