行政等级、土地市场化水平对城镇建设用地利用效益的影响

Impact of administrative level and land marketization level on urban construction land utilization benefits

在探讨2003—2019年276个城市以及不同行政等级城市土地市场化水平和城镇建设用地利用效益时序变化和差异基础上,本文用最小二乘虚拟变量模型实证检验行政等级、土地市场水平以及两者交互作用对城镇建设用地利用效益的影响,并用门槛效应模型进一步验证土地市场化水平的门槛效应。研究表明:(1)样本城市土地市场化水平和城镇建设用地利用效益总体在上升,一级行政级别城市土地市场化水平上升较明显,二级和三级行政级别城市城镇建设用地利用效益上升则较明显;(2)一级行政级别城市土地市场化水平总体低于二级和三级行政级别城市,但其城镇建设用地利用效益一直高于其他行政级别城市;(3)行政等级与城镇建设用地利用效益、经济效益和社会效益之间均存在显著的积极关系,土地市场化水平仅与城镇建设用地利用效益和经济效益之间存在显著的U型曲线关系,行政等级与土地市场化水平的交互项并未对城镇建设用地利用效益的提高产生协同作用,而与城镇建设用地利用经济效益和社会效益之间存在显著的积极关系。(4)若以土地投资强度作为门限变量,土地市场化水平对城镇建设用地利用效益存在显著双门槛作用。

In order to reveal the impact of administrative hierarchy and land marketization level on the utilization benefits of urban construction land in China,based on the study of the temporal changes and differences of land marketization level and land utilization benefits in 276 cities and cities with different administrative levels from 2003 to 2019,this article empirically tested the effects of administrative hierarchy,land marketization level and their interaction on land utilization benefits by using least square virtual variable model,and uses a threshold effect model to further validate the threshold effect of land marketization level.The results show that:1)The land marketization level and land utilization benefits in sample cities are on the rise.The land marketization level of first-level administrative cities is on the rise significantly,while the land utilization benefits is on the rise significantly in second and third-level administrative cities.2)The land marketization level of firstlevel administrative cities are generally lower than that of second and third-level administrative cities,but the land utilization benefits are always higher than that of other cities.3)There is a significant positive relationship between the cities'administrative level and the utilization benefits,economic and social benefits of land.And there is a significant U relationship between land marketization level and the utilization benefits and economic benefits of land.The interaction term between administrative level and land marketization level does not have a synergistic effect on land utilization benefits,but has a significant positive relationship with the economic and social benefits of land.4)If the intensity of land investment is taken as a threshold variable,land marketization level has a significant double threshold for the land utilization benefits.The conclusion enriches the research on the effect mechanism of China's administrative hierarchy system and land marketization level on urban construction land utilization benefits,and can provide a basis for the urban construction land development in cities with different administrative levels and for coordinated regional development.