本文利用产业间空间集聚度方法,计算京津冀都市圈制造业的空间集聚度,并通过时间趋势分析和区际对比,分析京津冀都市圈制造业的空间集聚水平。研究结论为:①2004年,京津冀都市圈制造业产业链的空间集聚度平均值为0.0151,属于低度空间集聚。②京津冀都市圈制造业产业链的空间集聚度呈逐年上升趋势。其中,资源密集型产业和资金技术密集型产业的空间集聚度上升趋势明显;劳动力密集型产业变化趋势不显著。③京津冀都市圈制造业产业链的空间集聚度低于长江三角洲地区,且产业链空间集聚与产业属性的关系不明确;技术密集型产业链的空间集聚度较低,而资源密集型产业的空间集聚度较高。

Industry agglomeration is not only within individual industries, but also the upstream and downstream industries with input-output relationship are more likely to agglomerate in space in order to save transportation cost and share external economy. As a result, more popular cases of industrial agglomeration are the geographical contiguity of industry group with two or more sectors. In this paper, Using a panel dataset of two-digit manufacturing industries by province during the period of 1995-2004, applying the co-agglomeration index proposed by Ellison and Glaeser, the authors explore the co-agglomeration of more than 60 industry chains in Beijing-Tianjin-Hebei Metropolitan region's manufacturing industries. Further more, through time trend analysis and regional comparison, the co-agglomeration of industry chain and regional competitiveness are explored in Beijing-Tianjin-Hebei metropolitan region. The results are drawn as follows. (1) The average value of co-agglomeration of industry chain is 0.0151, which shows less agglomeration in Beijing-Tianjin-Hebei Metropolitan Region. (2) The co-agglomeration of industry chain of manufacturing industries experiences the rising trend. Moreover, the industry chain of resource-intensive and capital-and-technology intensive industries show more obvious rising trend than labor-intensive industry during the period of 1995-2004. (3) The co-agglomeration of industry chain in Beijing-Tianjin-Hebei Metropolitan Region is lower than in Yangzi River Delta, which indicates that there have development phase gap between two regions. Some capital-and-technology intensive industries experience spatially dispersing process, but the resource-intensive industries concentrate, thus the relationship between co-agglomeration of industry chain and industrial attribute is not explicit in Beijing-Tianjin-Hebei Metropolitan Region.