The Research On Concentration Ratio Of Construction Industry Of Jiangsu Province

Since the reform and opening, the construction industry of Jiangsu province develops quickly.However, the construction industrial structure is not reasonable, for example, the diverse economy has not been formed and conducts are simplex. The most important problem we face now is that how to adjust it. As an important index for measuring the industrial structure, the industrial concentration ratio is the research object of the paper.Firstly, based on the analysis of construction industrial structure of Jiangsu, the paper brings forword the industrial concentratrion ratio, then not only establishes the parameter and the method of measuring it and some factors affecting it, but also analyses market structure classification according to it.Secondly, this paper summarizes some problems that exists in the enterprise size and business scope etc, through analysing the market structure of construction industry of China and some developed countries, Jiangsu and other provinces in China. Moreover, according to the characteristic of construction industry and"valid competition classification method", the paper educes that the ideal market structure of construction industry is monopolistic competition .Thirdly, the paper compares the construction industrial concentration of Jiangsu province in the last nine years , and analyses some factors affecting it(such as the concentration ratio of last year, market capacity growth rate ,production capacity, enterprise enterance rate etc)with the regression model.The conclusion is that the construction industrial concentration ratio is greatly related to the concentration ratio of last year and production capacity.In the end, in line with the analysed result,the paper gives some suggestions from three aspects(the production capacity of enterprise, enterance barracks and the industry policy), so as to optimize the construction industrial structure and enhance the competition of the construction industry.