中文摘要：

在供应商和销售商组成的二级供应链中，供应商隐藏关于生产成本的私人信息，销售商隐藏关于销售努力的行动，且双方地位相当，此时协调主体不明确。为了解决该问题，文章引入虚拟第三方为利他的委托人，站在供应链整体利润最大化的角度，设计基于收益共享和成本共担的协调契约，对供应商和销售商实施双向激励。研究结果表明：当收益共享比例和成本共担比例满足一定条件时，供应链实现了协调。此时，该契约调动了供应商降低生产成本、销售商提高努力水平的积极性，合作双方达到了“双赢”。笔者通过数值实验对结果进行了验证，表明了结果的有效性。

英文摘要：

In a single-period two-stage supply chain, the supplier and relailer keep equal market power by hiding supplier＇ s production cost information and the retailer＇s sales effort without a coordination main body . To deal with it, a virtual third party, as a selfless principal, is introduced to represent the whole interests of the supply chain, design the coordination mechanism basing on revenue sha- ring and effort cost partaking contract, and implement double incentives. The results show that if the revenue sharing proportion and cost sharing ratio meet some conditions within a certain range, the supply chain coordination could be realized, and the ＂win-win＂ for partners would be obtained. Finally, a numerical experiment is made to validate the results.