The Impact Of Agglomerative Force On Cluster Shapes

In recent years,the international situation has been profoundly adjusted,and the international status and competitiveness of China have been significantly improved.The implementation of the innovation-driven development strategy cannot be separated from the help of regional coordinated development.It is the general trend to form industrial clusters by strengthening regional innovation,rationally using regional resources and integrating advantages.With the rise of national awareness of IPR and the improvement of domestic IPR environment,China has formed a good innovation environment,and it is possible to use domestic patent data to research the industrial clusters.In order to study the development law of industrial clusters,this paper takes the Chinese patent citation data as sample,combining with the data of industrial enterprises,and defines the enterprise location choice model based on the externality theory in the new economic geography.We explore the correlation between the maximum radius of cooperation and the agglomeration force,and construct the model accordingly to obtain the estimated value of the maximum radius of cooperation.Thus,the linear correlation between the maximum radius of cooperation and the agglomeration level in different technical fields can be explored.Finally,the DO index is introduced as a measure of agglomeration level to further explore the change rule on continuous distance,and the following conclusions are drawn.First,the patent citation agglomeration phenomenon exists,that is,the maximum cooperation radius does exist,which is not only applicable to direct cooperation between enterprises,but also to indirect cooperation.Second,there is a negative correlation between the agglomeration level and the maximum radius of cooperation.There is a positive relationship between agglomeration force and maximum radius of cooperation,and a larger maximum cooperation radius is usually accompanied by larger and sparser clusters,that is,clusters with a lower level of agglomeration.Third,in the short distance range(usually 200 km),the agglomeration level will decrease sharply with the increase of distance,but this trend will become flat.Fourth,when the maximum cooperation radius increases,the average pairwise cooperation distance between firms will also weakly increase.The innovation of this paper lies in that,first,this paper does not use economic data,but uses domestic patent data to study industrial agglomeration,and combines patent data with spatial and enterprise data to conduct empirical analysis on cluster characteristics.Second,this paper breaks out of the framework of traditional economic theory and explores the impact of externalities on agglomeration from the perspective of distance based on the perspective of new economic geography,and builds a bridge between geographical distance and agglomeration level by defining a location choice model.Third,this paper generates target variables by constructing regression equations and further explores the correlation from the perspective of continuous distance by using DO index.Based on the above research and analysis,this paper gives suggestions from the perspectives of government and enterprises respectively: for the government,it should establish a unified and perfect patent database management system,break down local protectionism and regional barriers,and improve the construction of domestic transportation roads and other infrastructure.For larger enterprises,they should increase R&D investment and strengthen cooperation.For smaller enterprises,they should always pay attention to policies,rationally select locations,identify enterprise positioning,enlarge comparative advantages,strengthen goal orientation,enhance professional competitiveness and strengthen cooperation among small and medium-sized enterprises.