| The report of the 19 th CPC National Congress put forward the implementation of a coordinated development strategy for the region and the construction of a town structure with urban agglomerations as the main body to build coordinated development of large,medium and small cities and small towns.The Beibu Gulf urban agglomerations became a national strategy in 2017.However,due to the similar internal factors and similar development levels of the urban agglomerations,the Beibu Gulf urban agglomerations have the problem of convergence of industrial structures.Therefore,it is urgent to measure the internal industries of the Beibu Gulf urban agglomeration.The degree of construction and the impact on economic development lay the foundation for industrial optimization.On the basis of existing literature,this paper measures the degree of industrial homogeneity in 10 cities in the Beibu Gulf City Group and the level of industrial homogeneity in the cities of Nanning,Haikou,and Zhanjiang using regional similarity coefficients,structural similarity indices,and location entropy.Then,using the deviation-share analysis method to evaluate the homogeneity of its isomorphism,the countermeasures for optimizing the industrial structure of the Beibu Gulf agglomeration are put forward.The results of the study indicate that there is an issue of industrial homogenization on the whole of the Beibu Gulf urban agglomeration.The industrial same structure has different effects on the economic development of different cities,and there is a difference in the desirability of the industrial same structure in different industrial industries.Among them,the three industrial clusters of the Beibu Gulf City Group are of the same nature: Nanning,Beihai,Zhanjiang,Fangchenggang,and non-conforming cities: Chongzuo,Yulin,Qinzhou,Maoming,Yangjiang City and Haikou City.In terms of industry overall,the industrial homogeneity of Nanning is a consensus,but the industrial homogeneity of Haikou City and Zhanjiang City is non-consensual.The main innovation of this paper is to extend the research object of industrial homogenization to urban agglomeration. |