中文摘要：

首先,引入条件风险值（CVaR）准则,作为风险厌恶型的供应商和零售商的决策准则,建立了基于条件风险值（CVaR）准则的折扣回购策略双层风险决策模型.然后,导出了零售商在批发价格下的最优订购公式,证明了订购量随着折扣增大而增大,随着批发价格增大而减小,数值实验表明供应商可以通过折扣和批发价来分担零售商的风险损失,来使供应链达到协调.

英文摘要：

With the introduction of the rule of condition value-at-risk（CVaR） as the decision criteria for risk-averse suppliers and retailers,the paper first establishes a bi-level risk decision model on discount repurchases based on CVaR rule.Then the paper obtains the optimal ordering formula for retailers under wholesale prices,and proves that the order quantity increases with the increment in discount while decreases with the raise of wholesale prices.Numerical experiment shows that wholesalers could share retailers＇ risk loss by tools of discount and wholesale prices so as to coordinate the supply chain.