中文摘要：

针对双渠道供应链中渠道势力的变化,构建制造商领导的Stackelberg模型（MS模型）、纵向Nash模型（VN模型）和零售商领导的Stackelberg模型（RS模型）,并引入服务负溢出效应,考察供应链最优决策和绩效的差异。研究发现：（1）随着服务负溢出效应的增强,MS模型下的最优服务水平降低、批发价格上升,VN和RS模型下的最优服务水平不变、批发价格下降;（2）MS模型下,服务负溢出对零售价格的影响与溢出系数有关,VN和RS模型下的服务负溢出使零售价格下降;（3）制造商在MS模型中的利润最高,零售商在不同势力结构下的利润大小取决于服务负溢出系数;（4）在不同渠道势力下,供应链总绩效、直销渠道绩效和传统渠道绩效的变化,主要取决于服务负溢出系数和直销渠道潜在市场份额。

英文摘要：

Based on the change of channel power in dual channel supply chain, this paper studied its impacts on optimal decisions and supply chain performance by constructing manufacture Stackel- berg model （MS model）, vertical Nash model （VN model） and retailer Stackelberg model （RS mod- el）. The study finds that with the increase of service negative spillover effect, the optimal service level decreases and wholesale price increases in MS model, the optimal service level never changes, but wholesale price decreases in VN and RS model. The impact of service negative spillover effect on re- tailing price has something to do with spillover coefficient in MS model, but it decreases in VN and RS model. The profit of manufacture is biggest in MS model, but the profits of retailer in different chan- nel power structure are related to service spillover. The changes of dual channel supply chain perform- ance, direct channel performance and traditional channel performance in different channel power main- ly depend on the service negative spillover and the market share of direct channel.