中文摘要：

生产性服务业发达是全球城市的最重要的特征。以旨在建设全球城市的北京和上海为研究对象，以投入产出表为研究基础，从生产性服务业的中间投入性、外部关联性、内部融合性和尺度影响性4个方面对北京和上海的生产性服务业进行比较研究，得出如下研究结论：在现阶段，北京和上海的服务型经济已经形成，生产性服务业均以流通、金融服务业为主体，生产性服务业发展水平正在有序提升。其中，金融服务业对城市经济的影响与其产业规模相比是不对等的。北京与上海的生产性服务业发展差异显著，原因在于市场化程度和城市功能的不同。

英文摘要：

Fully developed producer services are the most important feature of global cities. Based on input-output analysis, this paper makes comparative research on producer services between Beijing and Shanghai with goals of global cities from four characteristics of intermediate input, external industry correlation, internal industry correlation and scale influencing and draws several conclusions. At present, service-oriented economy in Beijing and Shanghai have been formed. Finance and distribution have become the main body of producer services in Beijing and Shanghai. Producer services have exerted more and more influence on urban economy. Producer services, especially circulation services, have significant promotion effects on urban economy. Internal industry correlation among producer services is enhancing. The trend in which producer services serve for the local city is more obvious. The impact of finance on urban economy and the proportion of finance in urban economy are unequal. Finance is in a larger scale, but it has less intermediate input on urban economy, weaker external industry correlation in urban economy and looser internal industry correlation among producer services. There are different characteristics of producer services between Beijing and Shanghai because of different levels marketization, urban function and enterprise features. The industrial scale of producer services in Beijing is larger than that in Shanghai. But intermediate input, external industry correlation and internal industry correlation of producer services in Beijing are not as good as those in Shanghai. Moreover, producer services in Beijing are based on local city and the whole country while those in Shannhai based on the local city.