Research On Time And Space Evolution Of Chinese City Patent Quality

In order to better enhance the competitiveness of urban patents in China,this paper defines the quality of urban patents as the degree of influence of patents on the comprehensive competitiveness of cities,based on the components of patents and the management of the production and use of patents,through the quality of urban patent structures and city patents.The 12 indicators of legal quality,urban patent technology quality and urban patent market operation quality are used to construct the city patent quality evaluation system.The time lag of patent technology quality and market operation quality is taken into account.Finally,the city patent quality panel data of 279 prefecture-level and above cities in China from 2001 to2013 are calculated by dynamic factor analysis.The analysis shows that although the quality level of China's prefecture-level and above cities shows a slow upward trend.In the long-term,the difference in patent quality of Chinese cities has declined,but the convergence is not obvious..The quality of urban patents in China shows the pattern of high east and low west,and the quality of patents in Guangdong,Jiangsu,Zhejiang and Hebei provinces is relatively high.The spatial distribution of urban patent quality in China is concentrated most of the time.The Yangtze River Delta,the Pearl River Delta and other places have always been high-high concentration of urban patent quality,and radiate small urban agglomerations;urban patent quality is low-low aggregate large gathering In the western cities of China.A time and space analysis of the quality of patents in Guangdong cities.It is found that the average value of patent quality in Guangdong cities is far greater than the average value of national city patents.The quality of patents in Guangdong cities increased first and then decreased,and the gap in patent quality between prefecture-level and above cities also increased first and then decreased.In addition to Zhaoqing and Jiangmen,the nine cities of the Pearl River Delta have the characteristics of high per capita GDP,high patent quantity and high patent quality.Analysis of the urban patent quality structure of Guangzhou and Shenzhen in the two central cities of Dawan District of Guangdong,Hong Kong and Macao,and found that although Shenzhen has strong innovation ability as a whole,it still has shortcomings in urban technical quality and urban operation quality.An empirical test reveals that the impact of urban patent quality on technological transformation results is significant.