数字基础设施的建设促进皖江城市经济增长了吗?——来自“宽带中国”试点城市的经验数据

Has the Construction of Digital Infrastructure Promoted the Economic Growth of Wanjiang City?Empirical Data from "Broadband China" Pilot Cities

文章以“宽带中国”战略作为一次外生政策冲击,选用2011—2019年皖江城市的面板数据,采用双重差分法评估和识别数字基础设施的建设对皖江城市经济的政策效应和作用机制。研究发现:在满足平行趋势的假定条件下,数字基础设施的建设能够显著提高皖江试点城市的经济发展水平,并且该结论在安慰剂、替换解释变量与替换被解释变量的稳健性检验下依然成立;从机制分析来看,数字基础设施的建设能够通过提高皖江城市产业结构合理化水平、提升皖江城市创业活跃度以及创新水平促进皖江城市的经济发展。皖江城市政府应当注重人才的引进与培养、加快旨在保障数据安全的相关法律法规的建设、简化行政以优化营商环境。

Taking the strategy of"Broadband China"as an exogenous policy impact,this paper selects the panel data of Wanjiang cities from 2011 to 2019 to evaluate and identify the policy effect and mechanism of digital infrastructure construction on the urban economy of Wanjiang by using the DID method.The results show that,under the assumption of parallel trends,the construction of digital infrastructure can significantly improve the economic development level of Wanjiang pilot city,and this conclusion is still valid under a series of robustness tests including placebo,alternative explanatory variables,and alternative explained variable.From the perspective of mechanism analysis,the construction of digital infrastructure can promote the economic development of Wanjiang cities by improving the rationalization level of industrial structure,enhancing the entrepreneurial activity and enhancing the innovation level of Wanjiang cities.In view of this,the author draws the following enlightenments:Wanjiang city government should pay attention to the introduction and training of talents,speed up the construction of relevant laws and regulations aimed at ensuring data security,simplify administration and optimize the business environment.