技术创新集聚、货币外部性与区域生产率增长
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| Title | Technological Innovation Agglomeration, Pecuniary Externalities and Regional Productivity Growth
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| 作者 | 张丽华 陈伟忠 林善浪 |
| Author | Zhang Lihua, Chen Weizhong and Lin Shanlang |
| 作者单位 | 同济大学经济与管理学院 |
| Organization | School of Economics and Management, Tongji University, Shanghai |
| 作者Email | zhanglihua93@yahoo.com.cn；chen_wz@tongji.edu.cn；linshanlang@163.com |
| 中文关键词 | 集聚效应 全要素生产率增长 货币外部性 |
| Key Words | Agglomeration Effects; TFP Growth; Pecuniary Externalities |
| 内容提要 | 经济活动空间集聚的存在基础是它会产生集聚效应，作为一种外部规模经济，它为经济主体带来诸多益处。然而，集聚效应具有动态性特征，即随着集聚程度的上升，集聚效应的大小及作用方向都会随之变化。本文借助货币外部性理论，将集聚的正、负效应纳入同一分析框架，推导出集聚净效应随集聚程度变化的情况，并进一步证明了技术创新集聚程度与区域生产率增长之间的“倒U型”关系。最后利用我国286个地级及以上城市2005年至2009年的面板数据，在实证上检验了上述关系的存在。结果表明，区域全要素生产率（TFP）增长与区域技术创新集聚程度之间存在显著的二次函数关系，即在一定的临界值之后，随着技术创新集聚程度的进一步上升，区域TFP增长率随之下降。分区域结果表明，西部城市的技术创新集聚水平过低，未对该区域TFP增长产生显著影响，表明集聚效应的产生同时存在门槛值。 |
| Abstract | The reason for spatial agglomeration is the agglomeration effects associated with it. As a form of external scale economy, agglomeration effects can bring various benefits to economic agents. However, agglomeration effects will evolve over time, which means that it will have different effects according to different levels of agglomeration degree. This paper incorporates the positive and negative effects of agglomeration into one single framework and then reveals how the net agglomeration effects would change with agglomeration degree by introducing the concept of pecuniary externalities. Empirically, we utilize the panel data set for 286 Chinese cities form 2005 to 2009 to test the “inverted U-shaped” relationship between the degree of technological innovation agglomeration and regional productivity growth rate. Results show that there is significant quadratic relationship between regional total factor productivity (TFP) growth rate and degree of regional technological innovation agglomeration. This means that after a threshold level, the regional TFP growth rate will decrease with the increase of innovation agglomeration degree. We also carry out the regression for east, middle and west part of China respectively. Theses results show that the degree of technological innovation agglomeration of cities in the west part of China is too low to have significant impact on regional TFP growth, which illustrates that there is also a threshold value for agglomeration effects to arise. |
| 文章编号 | WP298 |
| 登载时间 | 2012-07-09 |
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