This paper empirically examines the impact of the opening of China Railway Express on up-grading the cities export structure by using the DID Mode and discusses the relevant mechanism behind it.The research shows that:firstly,the opening of China Railway Express in cities has significantly promoted the upgrading of urban export structure,and the research results are still significant under a variety of ro-bustness test methods;secondly,the mechanism test shows that the improvement of resource allocation efficiency and the improvement of regional innovation level are effective ways for cities to promote the up-grading of export structure.Further analysis shows non-equilibrium characteristics in the opening of China Railway Express.This study found that western cities,non-resource cities,and central node cities are more likely to receive policy dividends.
export structural upgradingChina Railway ExpressDID Modetrade powerinterna-tional transport corridor
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