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In recent years , along with the rapid development of China 's highway , the highway 's impact on the regional economy has increasingly become the focus of attention of the society and the government . Highway as a modern road transport channel plays an increasingly important role in today's economic life In view of the many advantages of the highway , China invest heavily in highway construction since 1998 . Jiangxi Province to respond positively to the development of the country's economic situation and economic strategic layout , increase investment in the highway . Of highway economic impact assessment , basically input-output method , system dynamics , macro measurement of economic law , from a certain sense, quantitative analysis of the pre- investment and post - economic effects of the highway project , but there are still insufficient . For example , input data required by the output method is difficult to collect and organize, and difficult to draw between departments ; originally a simulation model , the theoretical basis of the system dynamics model is relatively weak , and is not sensitive enough for the change of parameters . It is because the macro , comprehensive , quantitative difficult is the characteristics of the economic impact assessment of the highway project , so most studies have only focused on the preliminary studies of the project , the economic impact of highway projects late general qualitative research - based or incorporated into the social impact of the highway project evaluation . This paper combines the of Jiangxi given along the highway survey , domestic and international data query and finishing , gray system theory , comparative analysis , econometrics methods , a combination of qualitative and quantitative analysis , theoretical research and empirical analysis of the unity of Jiangxi given the economic impact of the highway evaluate gray GM (1,1) model , calculate the extent of the impact and contribution of Jiangxi given highway along the national economy around , and how the spill-over effects on other sectors , for highway the economic evaluation of the project is to provide a new way of thinking , to provide a scientific basis for the highway and the coordinated development of the economy .
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