| The Yangtze River Economic Belt spans across the eastern,central,and western regions of China,and is one of the country’s important economic growth poles,as well as the region with the strongest comprehensive strength and greatest development potential.In the context of the construction of the "the Belt and Road" and the "new land and sea channel in the west",the Yangtze River Economic Belt is ushering in a critical period of development.The rapid development of ports has provided new impetus for the economic development of port cities,while the prosperous development of port cities has also provided various resources and services for the ports,improving their comprehensive strength.Therefore,under the new situation,it is particularly important to clarify the degree of interactive development between ports and cities in the Yangtze River Economic Belt,explore strategies for interactive development between ports and cities,fully play the interactive role between ports and cities,and achieve coordinated development between ports and cities.This article evaluates the efficiency and analyzes the influencing factors of the ports and cities in the Yangtze River Economic Belt,objectively evaluating the current situation of the development of the ports and cities in the Yangtze River Economic Belt.Firstly,based on clarifying the connotation of port city interactive development,this paper analyzes the current development status of ports and cities in the Yangtze River Economic Belt,and constructs an evaluation index system for the efficiency of port city interaction.Secondly,a global two-stage NDDF model is used to study the interactive development efficiency of 17 ports and cities in the Yangtze River Economic Belt between 2010 and2020.The efficiency of the complex system composed of ports and cities is accurately measured under the same framework.Based on the evaluation results,the development imbalance between ports,cities,and port cities in the Yangtze River Economic Belt is studied and judged.In order to provide a more targeted decision-making basis for the optimal allocation and efficient utilization of resources between ports and cities,this article uses Tobit regression model to further explore the main influencing factors in the interactive development of ports and cities in the Yangtze River Economic Belt.Finally,countermeasures and suggestions are proposed for relevant issues to promote the coordinated development between ports and cities.Based on the above research,the following conclusions are drawn: First,overall,the port city system in the Yangtze River Economic Belt has developed well,with an average efficiency of 0.615 for interaction between ports and cities,and there is still some room for efficiency improvement.In terms of stages,the efficiency difference of the Yangtze River Economic Belt in the port stage is relatively large,while the efficiency difference in the urban stage is relatively small,showing a steady upward trend over the years;From the perspective of regional differences,there are certain regional differences in the efficiency of interactive development between ports and cities in different regions;Secondly,the research on the impact of external factors on the port city interaction shows that factors such as the quality of the city’s economy,the development of the secondary industry,the development of the tertiary industry,and the level of science and technology have a significant positive impact on the efficiency of port city interaction,and there is a negative impact on the investment in port infrastructure.Finally,based on the regression results,relevant suggestions for the interactive development of ports and cities in the Yangtze River Economic Belt are proposed. |
