Abstract: In a two-echelon supply chain of ameliorating items consisted of a single supplier and retailer,through designing coordination mechanism with price discount and trade credit,the profit gains and coordination problems of each member in the decentralized supply chain was researched.The profit levels of supplier and retailer as well as the maximum profit increment per unit time after coordinating were obtained respectively.The result showed that the coordination of ameliorating items' supply chain and Pareto improvement of member enterprises' profit level could be realized with the supplier providing price discount and trade credit as the coordination mechanism.A numerical example was presented to verify the main results,and the impact of the relevant changed parameters on the maximum profit increment per unit time for supply chain system and each member was researched.

Key words: ameliorating items, supply chain coordination, price discount, trade credit, Nash bargaining theory

摘要： 为了对零售商实施有效的激励手段,考虑在单一供应商和单一零售商构成的两级改良品供应链系统中,以价格折扣和交易信用作为协调机制,研究分散式供应链下各成员企业的利润状况和协调问题,分别得到供应商和零售商的利润水平与协调后的单位时间最大利润增量。研究表明：在供应商提供价格折扣和交易信用作为协调机制时,能够实现改良品供应链的协调以及成员企业利润水平的Pareto改善。通过一个数值算例验证了所得出的主要结论,并考察了相关参数变化对改良品供应链系统及成员企业单位时间最大利润增量的影响。

关键词: 改良品, 供应链协调, 价格折扣, 交易信用, 纳什讨价还价理论