Knowledge Capital Accumulation,Spatial Spillover,and the Emergence of Urban Agglomeration Innovation Center—A Case Study of the Yangtze River Delta Urban Agglomeration
Leveraging urban agglomeration innovation center to lead and guide innovation transformation and the construction of a modern industrial system holds significant importance for both the layout of an innovative nation and the guidance of ur-ban agglomeration innovation.On the theoretical front,utilizing the expanded three-region Local Spillover(LS)model of New Economic Geography,which disrupts the initial two-region symmetric abstract spatial core setting of new economic geography,engages in theoreti-cal analysis regarding the formation mechanism,structural characteristics,and spatial evolution of urban agglomeration inno-vation centers.The model exhibits a central feature of"local spillover-knowledge accumulation loop-innovation agglomera-tion"and emphasizes the"cluster"attribute of"inter-city local spillover-mutual reinforcement between cities-innovation space correlation".It comprehensively considers the formation mechanism of urban agglomeration innovation centers under the combined effects of the"central"mechanism of knowledge circulation accumulation and the"cluster"mechanism of knowledge space spillover.At the empirical analysis level,conducting an empirical analysis on the 41 cities in the Yangtze River Delta urban ag-glomeration,from 2000 to 2020,characterized as the most innovative urban agglomeration,examines their knowledge of capi-tal accumulation,spatial spillover mechanisms,and explores how urban agglomeration innovation centers radiate and drive peripheral cities,and how peripheral cities undertake the linkage mechanism of innovation overflow from innovation centers,as well as the mechanisms facilitating the formation of urban agglomeration innovation centers.The main conclusions are as follows:(1)The causal relationship in the cyclical accumulation leading to the formation of urban agglomeration innovation centers lies in the knowledge capital accumulation.As knowledge capital accumulates,the cost of urban knowledge production(innovation)gradually decreases,thereby promoting the endogenous aggregation of knowl-edge capital.This cycle repeats,ultimately facilitating the formation of urban agglomeration innovation centers;(2)Knowledge capital spatial spillover is the dominant factor in forming innovation centers.There are differences in local spillover and cross-regional spillover of knowledge capital in different regions of urban agglomerations,further reinforcing the"innovation center-peripheral city"structure;(3)The interaction of urban agglomeration innovation centers lies in the consolidation of the"cluster"structure through the overflow of knowledge from innovation centers,and the receptivity of peripheral cities en-hances the competitiveness of the"center",thereby improving the overall welfare level of the urban agglomeration;(4)In the Yangtze River Delta urban agglomeration,the effects of local market and knowledge capital spillover promote the formation of innovation centers,while market congestion effects play an inhibitory role.Fostering urban innovation centers is a pivotal cornerstone in advancing the national innovation-driven strategy and the development pattern of innovation within urban clusters.This discourse not only introduces novel perspectives to address the issue of central city"siphoning"and optimize the allocation of innovative resources but also furnishes a theoretical basis and decision-making reference for constructing an innovation system within urban clusters and nurturing innovation hubs within these clusters.
Knowledge Capital AccumulationKnowledge Spatial SpilloverUrban Agglomeration Innovation CenterNew Economic Geography
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NSTL
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