新疆公共投资效率对相对贫困的影响及异质性研究

Research on the Impact and Heterogeneity of Public Investment Efficiency on Relative Poverty in Xinjiang

随着中国绝对贫困的消除,公共治理的重点之一就是缓解相对贫困,促进共同富裕.这本质上是通过公共投资提高居民收入的问题.为了更加充分发挥公共投资在新疆相对贫困中的积极作用,本文利用新疆14个地州市2010-2020年的面板数据,借助DEA方法和SDM模型,将技术进步作为调节变量,实证对比分析经济性和公益性公共投资效率对全疆、南疆和北疆城乡居民相对贫困影响的减缓效应.研究结果表明:新疆公共投资效率总体呈上升趋势,且具有显著的空间关联性以及异质性特点;经济性公共投资效率在缓解南疆农村居民相对贫困中的本地效应、在缓解北疆城乡居民相对贫困的空间溢出效应比较显著.公益性公共投资效率对北疆城乡居民相对贫困的本地效应及各区域农村居民相对贫困的空间溢出效应具有明显的正向促进作用,但对北疆城镇居民相对贫困呈现出显著的虹吸效应;技术进步对公共投资效率和相对贫困关系产生显著的调节作用,即表现出显著且稳定的直接效应和间接效应.

With the elimination of absolute poverty in China,alleviating relative poverty and promoting common prosperity is one of the priorities of public governance.This is essentially a problem of increasing residents income through public investment.In order to give full play to the positive role of public investment in relative poverty of Xinjiang,this paper based on the panel data of 14 prefectures and cities in Xinjiang from 2010 to 2020,uses DEA method and SDM model,takes technological progress as the adjustment variable,and empirically compares and analyzes the mitigation effect of the economic and welfare public investment efficiency on the relative poverty of urban and rural residents in whole Xinjiang,Southern and Northern Xinjiang.The results show that the overall efficiency of public investment in Xinjiang showed an upward trend,and had significant spatial correlation and heterogeneity.The local effect of economic public investment efficiency in alleviating the relative poverty of rural residents in Southern Xinjiang and the spatial spillover effect in alleviating the relative poverty of urban and rural residents in Northern Xinjiang were relatively significant.The efficiency of welfare public investment had a positive local effect on relative poverty of urban and rural residents in Northern Xinjiang and the positive spatial spillover effect on relative poverty of rural residents in whole area,but it had a significant siphon effect on the relative poverty of urban residents in Northern Xinjiang.Technological progress had the significant moderating effect on the relationship between public investment efficiency and relative poverty.It showed significant and stable direct and indirect effects.