政府发展性支出、产业集聚与绿色能源效率

为了探索政府发展性支出在产业集聚影响能源效率过程中的边界,本文从理论和实证两个角度验证了政府发展性支出在产业集聚影响能源效率过程中的调节机制和门槛效应,研究发现:(1)理论上政府发展性支出在产业集聚影响能源效率过程中存在调节效应,伴随着政府发展性支出的不断增加,产业集聚对能源效率的影响呈倒"N"型作用路径。表明过低或过高的政府发展性支出都会导致产业集聚扭曲,不能发挥其应有的正外部性,进而抑制能源效率的改善,只有适度的政府发展性支出才能发挥产业集聚应有的绩效,有助于能源效率的提升;(2)利用中国2004—2017年268个地级市的城市面板数据,在规避内生性问题的基础上,通过静态面板交互效应模型,验证了政府发展性支出在产业集聚影响能源效率过程中存在调节效应的理论假说;(3)采用面板门槛模型,验证了产业集聚影响能源效率的过程中存在政府发展性支出的双重门槛效应,门槛值分别为0.2517和0.2946,对不同政府发展性支出水平进行分组计量回归,结果与理论分析中产业集聚对能源效率的影响呈倒"N"型路径相吻合。表明,过高或过低的政府发展性支出趋向于抑制能源效率的提升,适度的政府发展性支出有利于能源效率的改善。

Government development expenditure, industrial agglomeration and green energy efficiency

In order to explore the boundary of government development expenditure in the process of industrial agglomeration affecting energy efficiency,the regulatory mechanism and threshold effect of government development expenditure in the process of industrial agglomeration affecting energy efficiency from both theoretical and empirical perspectives is verifid.The results show that:firstly,In theory, government development expenditure has a moderating effect in the process of industrial agglomeration affecting energy efficiency. The impact of industrial agglomeration on energy efficiency shows an inverted "N" type path with the continuous strengthening of government development expenditure.It shows that too low or too high government development expenditure will lead to the distortion of industrial agglomeration, which can not play its due positive externality, and then inhibit the improvement of energy efficiency. Only moderate government development expenditure can play the due performance of industrial agglomeration and help to improve energy efficiency.Secondly,on the basis of avoiding endogenous problems, it uses the static panel interaction model to verify the theoretical hypothesis that government development expenditure has a moderating effect in the process of industrial agglomeration affecting energy efficiency based on the panel data of 268 prefecture level cities in China from 2004 to 2017.Thirdly, it uses panel threshold model to verify the dual threshold effect of government development expenditure in the process of industrial agglomeration affecting energy efficiency,the threshold values were 0.2517 and 0.2946, respectively.Then, the group econometric regression of different levels of government development expenditure is carried out, and the results are consistent with the inverted "N" path of the impact of industrial agglomeration on energy efficiency in the theoretical analysis.Research shows that too much or too little government development expenditure tends to inhibit the improvement of energy efficiency and moderate government development expenditure is conducive to the improvement of energy efficiency.