最后通过构建信息甄别模型求出了在双方对第三方物流企业的成本类型存在信息不对称时，制造商的最优协调策略。

At last we establish a screening game model to get manufacturer's optimal strategy when he can't get the full information about TPL's handling cost type.

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文章建立了基于数量折扣策略且能最大化供应商期望利润的信息甄别模型，分析了模型解的性质，给出了求解方法。

We formulate a screening model to maximize supplier's profit, then analyze the properties of the model and put forward the solution procedures.

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