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| Regional Integration and Urban Innovation:based on the Quasi-natural Experiment of the Enlargement in Yangtze River Delta |
| Shao Hanhua,Wang Yao,Luo Jun |
| (School of Economics and Management,Nanchang University,Nanchang 330000,China) |
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Abstract As Chinese cities entered a new era of metropolitan region development, regional integration is having a profound and extensive impact on urban innovation. This study deeply analyzed the potential mechanism of regional integration for urban innovation from the aspects of the flow and integration of innovation resource, knowledge technology spillover and market scale expansion. Moreover, this paper took the panel data of 283 cities in china from 2003 to 2018 as samples, and regarded the enlargement in Yangtze River Delta as a quasi-natural experiment. In addition, it empirically analyzed the relationship between the enlargement in Yangtze River Delta and urban innovation by using synthetic control method and PSM-DID model. The results showed that: ①Overall, the enlargement of the Yangtze River Delta significantly promoted the improvement of whole cities 'urban innovation. And in terms of different regions, the expansion also significantly improved the urban innovation of incumbent cities and new cities, but new cities' improvement was greater than the influence of incumbent cities.②The results of heterogeneity analysis showed that the expansion policy had a stronger effect on the urban innovation cities which located in Scientific Innovation Corridor than other cities, meanwhile, the improvement of regional accessibility can also significantly enhance the expansion policy's effect on urban innovation.③Further analysis found that the effect of expansion policy on urban innovation shows a trend of diminishing marginal effect. The results of this study is of great significance to promote the integrated development of the Yangtze River Delta, deepen regional innovation cooperation, and develop the innovative demonstration in the Yangtze River Delta region.
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Received: 23 October 2020
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