| Public infrastructure is the material foundation of urban economic and social development,and it is also an important carrier to exert government functions and realize urban functions.With the advancement of science and technology and the improvement of people’s lives,urban development has put forward higher requirements for the construction of public infrastructure.Since entering the 21st century,the construction of public infrastructure in northeastern cities has been overtaken and gradually distanced by the eastern developed regions.The short-board effect has become more apparent as the industrial scale continues to expand.As far as the economic mechanism of public infrastructure is concerned,its investment scale and investment structure should be compatible with economic growth and structure,so as to ensure that the external spillover effect of public goods can be fully absorbed and utilized by the private sector.The proportion of urban public infrastructure investment in fixed assets investment in Northeast China has been stable at around 30%in recent years.The overall scale increment control and internal structure adjustment are the keys to determine its future role in promoting economic growth,which is not only manifested as spillover effect on output growth,but also as continuous improvement in efficiency in social environment an other fields.Based on the above background,this paper selects the panel data of 34 northeast cities from 2008 to 2017 to conduct an in-depth analysis of the investment efficiency of public infrastructure This article is strictly based on basic theory,with CCR model,BCC model and panel Tobit model as the main technical means,comprehensively combining theoretical research and empirical research,cutting-edge analysis and measurement inspection,horizontal comparison and vertical comparison.Methods:From different perspectives,theoretical analysis and empirical analysis of the scale increase,structural optimization,efficiency improvement and mechanism mechanism of public infrastructure investment in northeast cities were conducted.The main conclusions and policy implications are as followsFirst,the fluctuation of public infrastructure investment in northeast cities is synchronized with the downward economic growth path.In 2015,the investment scale of Liaoning Province fell steeply and has not yet recovered to the highest level in hi story.Although the investment scale of Jilin and Heilongjiang provinces is steadily expanding,the growth rate decline is very obvious.Investment in public infrastructure in northeastern cities is mainly concentrated in the three major areas of water and electricity supply,transportation and water conservancy environment.The slow adjustment and optimization of the investment structure has led to a relatively lag in the improvement of investment performanceSecond,there are significant differences in the efficiency of public infrastructure investment in northeastern cities.The technology utilization and scale allocation of Daqing,Suihua and Hegang have all achieved the Pareto optimal efficiency level over the years,and these three cities can moderately expand the investment scale in the future.In most small and medium-sized cities,there is a general two-round deterioration of technical efficiency and scale efficiency.Improving the level of advanced technology utilization,avoiding excessive deepening of public capital,and paying attention to the optimization of public investment structure are the main adjustment directions for these cities’ future public infrastructure investmentThird,the technical efficiency and scale efficiency of public infrastructure investment in sub-provincial cities in Northeast China are characterized by "one high and one low".The technical efficiency of public infrastructure investment in the four sub-provincial cities of Shenyang,Dalian,Changchun and Harbin is at the Pareto optimal level,but scale efficiency has deteriorated very seriously.Although the economic aggregates of the four cities are relatively large,the structural imbalance between investment increments and economic increments is more prominent.Future public infrastructure investment should focus on coordination and linkage with economic development and strengthen the optimization and adjustment of investment structuresFourth,the economic development of the private sector significantly promotes the overall efficiency of public investment.The expansion of public infrastructure investment per capita has a significant negative inhibitory effect on the improvement of overall investment efficiency.The increase in per capita output,financial scale,and industrialization level can significantly promote the improvement of public infrastructure investment efficiency.Most cities in the Northeast should pay more attention to the economic development of the private sector,scientifically assess the shortcomings faced by urban public infrastructure,pay attention to the coordinated linkage of investment scale and economic growth,and promote the optimization of investment structure and efficiency. |
