中文摘要：

研究因特网普及环境中的证券营业部空间布局等因素，以及影响证券公司投入产出效率的机理。逻辑分析各类因素综合影响公司效率的机理并提出理论假说，基于模型分析，构造一类新指标将区域因素和竞争因素整合到企业层面，利用2006～2008年横截面数据，运用DEA方法和Tobit模型实证考察各类因素与证券公司效率之间的联系。研究发现：因特网、区域变量和网点空间布局对公司效率均具有显著影响，竞争区域可能比竞争结构更重要，网点规模相对较高的公司效率反而较低。前述影响机理的显著存在性及其特征不但暗示着因特网普及的环境中证券公司仍需考虑网点选址和布局问题，还可为营业部的选址和空间布局策略、证券公司空间布局竞争力的评价和投资选择等问题提供策略启示。

英文摘要：

This paper aims to analyze the mechanism that efficiency of banks and their branches are influenced by regional factors and spatial distribution of branches in the internet era. A theoretical hypothesis is put forward according to characteristics of securities industry in China that the performance of investment banks is influenced by spatial distribution of branches and internet. Based on a theoretical model, a series of comprehensive indicators are identified to integrate spatial information of all branches and the regional factors, and the competition in cities. The empirical study using cross-sectional data of Chinese in- vestment banks from 2006 to 2008 shows that spatial variables, especially regional factors do matter to the performance of samples so far, while internet plays a positive role and the influence of different regional factors varies. It seems that the competition place is more important than competition structure in a city. And the smaller size of branch network is associated with higher performance. Finally, the policy meaning is discussed on aspects such as location strategy of banks to set up a new branch or adjust the spatial distribution of branches to gain better performance, and assessment of banking industrial power origi- nated by spatial network, which is related to the choice of investors about investment of banks.