| Summary: | 碩士 === 國立成功大學 === 交通管理科學系 === 103 === In this research, we add the spatial concept in supply chain and develop a two- echelon model which contains two suppliers, two retailers and four consumer groups. The distance between retailers and consumer groups is a linear function, and the demand of retailers is determined by consumer utility function. The research model can be divided into five spatial situations, and each situation can derive different price range of retail product. By game theory, we can get the equilibrium price of two products, and we construct two cooperation models between the upstream and downstream. One is a quantity-discount contract between supplier and retailer, the other is invasive channel cooperation model. Through the quantity-discount contract, it can not only get the equilibrium price of the two products, but also enhance the scope of retailer's market when the discount factor is 0.7. And it also can increase the total profit of supplier 2 and retailer 2. In the invasive channel which supplier 2 betrayed and cooperate with retailer 1, the cooperation model is a stable solution. Finally, we can conclude that in the spatial supply chain, consumers are more sensitive to product price than product diversity. And the cooperation strategy which supplier 2 invades retailer 1 is the best strategy of each supply chain member. No matter the upstream and downstream cooperate each other by supply chain contract, the supplier and retailer will prefer different channel structures.
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