中文摘要：

在需求不确定且与努力水平和零售价格具有相关性的前提下，建立了弹性数量契约模型，通过引入回馈与惩罚策略，解决了单纯的弹性数量契约无法实现供应链协作这一问题。并重点探讨以下两个主要内容：（1）如何确保供应链协作；（2）如何确定最优的努力水平、零售价格和订购量。最后，通过数值例子对协作和分散两种模式进行了分析比较。

英文摘要：

In view of the fact that an one-supplier one-retailer supply chain faces stochastic effort and pricedependent demand, a model of the quantity flexibility contract is established, then the channel rebate and penalty is introduced to solve the problem that just one quantity flexibility contract can not coordinate the supply chain with effort and price-dependent demand. TWO problems are addressed： （1） how to coordinate the decentralized supply chain; （2） how to determine the combined effort, price and inventory decision. At last, the new model is employed to analyze the results with numerical examples.