关键词: 集聚效应,企业集聚,城市生产率,城市异质性

Abstract: With the acceleration of urbanization, industrial enterprises are increasingly concentrated in a certain range of cities and gradually become an important dominant feature of urban economy. Based on the systematic interpretation of the occurrence mechanism of industrial enterprises agglomeration effect theory, this paper attempts to put forward “the promotion theory of industrial enterprises agglomeration effect”and“the city type difference theory”, so as to have a multidimensional recognition of the function of industrial enterprises agglomeration as a city industrial layout strategy. At the same time, it uses the empirical data of 275 cities in China at the prefecture level or over during 1999-2015 for an empirical testing, finally the more reliable conclusions on the basis of the robustness analysis and overcoming of endogenousness are drawn: (1) the industrial enterprises agglomeration has a significant positive promoting effect on urban productivity; (2) compared with the non-provincial capital cities and non-coastal cities, the industrial enterprises agglomeration in the provincial capital cities and coastal cities has a greater promotion effect on urban productivity, while the resource-based cities do not have this feature; (3) the industrial enterprises agglomeration does not meet the inflection feature of the“Williamson effect”point.

Key words: agglomeration effect; enterprise agglomeration; urban productivity; urban heterogeneity