Influence Of Agglomeration Effect Of Beijing-tianjin-hebei On County Economic Growth

In the context of the integrated development of Beijing-Tianjin-Hebei(BTH)region as a national strategy,it is necessary to analyze the relationship of economic growth between large cities and small cities in this region and to clarify whether large cities are really conducive to the economic growth of small cities in order to shake off poverty,build of a moderately prosperous society in all respects,implement the national new urbanization strategy for the coordinated development of large,lmall and medium-sized cities and small Towns.Taking 128 small cities in Beijing,Tianjin and Hebei as examples,this paper estimates the spatial spillover effects between cities from both same and different hierarchies by adding geographical distance,administrative boundary and industrial structure into classic economic growth model.It is found that the core cities restrain the economic growth of the surrounding small cities which supports that the "agglomeration shadow" proposed by new economic geography and the phenomenon "poverty belt around Beijing and Tianjin".Negative spillovers of economic growth exist among small cities,compared with the Yangtze River Delta region where core cities benefit the economic growth of their adjacent cities,the radiating function and the trickle-down effect of core cities within the BTH region are obviously weak,and the development gap between large and small cities is greater.Finally,policy implications are put forward on how to make use of spatial spillover effect and promote the coordinated development among large,medium-sized,and small cities from the aspects of breaking market segmentation caused by administrative boundaries,strengthening the radiation spillover effect of central cities,and scientifically orientation of urban functions at all levels.In the future,we should realize the strategy of multi-center spatial development,seize the strategic opportunity of the construction of Xiongan New District,break the administrative division,promote regional coordination and division of labor,and form a reasonable and orderly urban agglomeration spatial structure system of large,medium and small cities on the premise of the government's active guidance and respect for market rules.