双重目标约束下土地资源错配与城市绿色全要素生产率

Land Resources Misallocation and Urban Green Total Factor Productivity under Dual Target Constraints

人与自然和谐共生要求土地资源高效利用和经济绿色发展。因此,从经济增长和环境保护双重目标约束视角,分析土地资源错配对城市绿色全要素生产率的影响具有重要意义。基于2007—201 9年中国284个地级城市面板数据的实证研究发现,土地资源错配显著抑制了城市绿色全要素生产率的提升,在经过一系列诸如更换解释变量、缩尾处理等稳健性检验与内生性分析后,该结论依然成立。具体而言,土地资源错配的抑制效应是通过促进城市蔓延和降低城市绿色创新实现的,在中西部地区城市、非资源型城市和中型城市,其抑制效应更为明显。进一步分析发现,经济增长目标会强化土地资源错配对城市绿色全要素生产率的抑制作用;环境目标强约束会显著削弱土地资源错配对城市绿色全要素生产率的抑制作用,而环境目标弱约束的调节作用不显著。因此,需要进一步推动土地要素市场化改革、构建市场化导向的绿色创新技术体系、加强官员考核的环境目标约束条件,以缓解土地资源错配程度,从而提高城市绿色发展效率。

The harmonious coexistence between man and nature requires efficient use of land re-sources and development of green economy.From the perspective of the dual constraints of economic growth target and environmental protection target,it is significant to analyze the impact of land re-source misallocation on urban green total factor productivity.This paper conducts an empirical study based on the panel data of 284 prefecture cities of China from 2007 to 2019.The findings show that land resources misallocation significantly inhibits the improvement of urban green total factor produc-tivity.After a series of robustness test and endogenous analysis,such as changing explanatory vari-ables,shrinking tail treatment and so on,the conclusions still hold.Specifically,the inhibitory effect of land resource misallocation is realized by promoting urban sprawl and reducing urban green inno-vation,and the inhibitory effect is more obvious in the central and western cities,non-resource-based cities and medium-sized cities.Further analysis reveals that economic growth target will strengthen the inhibiting effect of land resources misallocation on green total factor productivity,and that strong en-vironmental target constraint will significantly weaken the inhibiting effect of land resource misalloca-tion on green total factor productivity,while the regulating effect of the weak environment target con-straint is not significant.Therefore,it is necessary to further promote the market-oriented reform of land factor,build a market-oriented green innovation technology system,strengthen the environmental target constraints of official assessment,alleviate the degree of land resource misallocation,so as to improve the efficiency of urban green development.