区域一体化扩容能否促进高质量发展——基于长三角实践的准自然实验研究

Can Regional Integration Enlargement Promote High-quality Development:A Quasi-natural Experimental Research Based on Practice in the Yangtze River Delta

区域经济的高质量发展离不开资本要素的高效利用。本文基于2003—2017年中国284个地级市的面板数据,以"长江三角洲城市经济协调会"样本期内两次扩容为准自然实验,利用广义合成控制法和双重差分法验证了区域一体化扩容对资本配置效率的影响。结果发现:(1)扩容改善了区域资本配置效率,且改善作用随时间增加而增大;(2)扩容对新进外围城市的资本配置效率改善作用小于原位中心城市;(3)扩容改善了安徽与江苏境内的新进外围城市资本配置效率,但对浙江境内新进外围城市改善作用不明显。本文还进一步对区域一体化扩容改善资本配置效率的机制进行检验,结果发现扩容能通过"打破流动壁垒"、"完善产业分工"和"提升区域金融水平"三种作用机制改善资本配置效率。

The high-quality development of the regional economy is inseparable from the efficient use of capital elements.Based on the panel data of 284 prefecture level cities in China from 2003 to 2017,this paper used the generalized synthetic control method and Difference-in-differences method to verify the impact of regional integration enlargement on the efficiency of capital allocation,taking the two enlargements during the sample period of the"Yangtze River Delta Urban Economic Coordination Association Committee"as a quasi-natural experiment.The results showed that:(1)The enlargement improved the efficiency of regional capital allocation,and the improvement effect increased with time;(2)the improvement effect of enlargement on the capital allocation efficiency of the new peripheral cities was less than that of the in-situ central cities;(3)the enlargement improved the capital allocation efficiency of new peripheral cities in Anhui and Jiangsu,but it had little effect on the new peripheral cities in Zhejiang.This paper further tested the mechanism of regional integration enlargement to improve the efficiency of capital allocation.It found that enlargement could improve the efficiency of capital allocation through"Breaking the flow barrier","Improving the industrial division"and"Improving the regional financial level".