中文摘要：

研究具有单一供应商和单一销售商的供应链系统回购契约协调机制。分析了报童模型下两级供应链双边际化效应，建立了基于报童模型的分散式系统、集中式系统的供应商、销售商利润模型，讨论了如何通过回购契约来消除“双边际化效应”。结果表明：回购契约的采用使批发价格比不采用契约时的批发价格低，且使订货量增加，从而使供应链的总利润增加，并且减少了缺货带来的损失，同时更好的满足了顾客需要。最终实现了独立个体最优决策与系统最优决策一致化的供应链协调。

英文摘要：

This paper conducts a research on buy-back coordination mechanism in supply chain system of a single supplier and a single retailer. The double marginalization effect under the newsboy model in a two stage supply chain is analyzed. The profit models of the supply chain members are constructed to analyze the way to eliminate the double marginalization effects through wholesale price contracts. The results show that buy-back contract can lower the wholesale price increase the order. Thus the total profits increase and losses reduce while customer＇s needs meet better. Ultimately, the optimal decision making independently by the supplier and retailer is consistent with the system optimal in the supply chain.