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中文摘要：
构建了一个上游为一个垄断中间投入品生产企业，下游为存在质量差异且进行古诺竞争的双寡头纵向结构，考察纵向结构对下游企业创新激励的影响．研究表明：上游投入品生产企业对下游企业实行歧视性定价，以保证不同产品质量企业存在；在纵向分离结构下，一个下游企业产品质量的提高会降低其竞争企业的创新激励；在纵向一体化结构下，竞争企业质量提高会降低一体化企业的创新激励，而一体化企业质量提高会增加竞争企业的创新激励；与纵向分离结构相比，纵向一体化结构提高一体化企业的创新激励，抑制竞争企业的创新激励．
英文摘要：
This paper establishes a vertical structure with an upstream monopoly and two downstream duopolies. Downstream firms compete in quantity and their products are vertically differentiated. Such a model is structured to examine the impact of vertical structures on downstream innovation incentives. This study shows that the upstream monopoly will implement a discrimination price. Quality improvements of downstream firms are reciprocally inhibited under vertical separation. Under vertical integration, the quality improvement of the competitive firm will depress the integrated firm＇s innovating. On the contrary, the quality improvement of the integrated firm will enhance the innovation of the competitive firm. Compared with verti- cal separation, vertical integration accelerates downstream innovation of the integrated firm but decelerates the innovation of the competitive firms.
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