| In recent years,with the global economic integration,all countries in the world have realized that economic globalization is an inevitable trend of world development.The commercial trade between countries is gradually increasing,and the trade competition is becoming more and more fierce.With the improvement of productivity and rapid economic growth in various countries,environmental problems have increasingly become the focus of people’s attention,and environmental friendly development to improve productivity,reduce pollutant emission and reduce input has become a goal of economic development.In this context,this paper makes theoretical analysis and empirical test on the influence of trade comprehensive competitiveness on GTFP.This paper focuses on the relationship between comprehensive trade competitiveness and green total factor productivity of G20 member countries.Firstly,the relevant economic and trade-related statistics of G20 member countries are sorted out,and the impact of comprehensive trade competitiveness on green total factor productivity is explored from the aspects of scale effect,technological innovation effect and threshold effect,and the hypothesis of this paper is proposed.Thirdly,this paper uses SBM-GML model to estimate the green total factor productivity(GTFP)of G20 member countries from 2006 to 2020,and decomposes GTFP from two aspects of technological progress and technical efficiency.Based on the measured results,developed economies and developing economies are analyzed and compared.The index of comprehensive trade competitiveness is constructed and the result shows that the comprehensive trade competitiveness of developed economies is higher than that of developed economies on the whole.According to the calculation results,this paper proves that the comprehensive competitiveness of trade has a significant promoting effect on GTFP from the overall and sub-economic levels.Then,the threshold model is used to verify that the influence of comprehensive competitiveness of trade on GTFP does exist the threshold effect of the level of economic development and human capital,to verify the hypothesis proposed in this paper.Finally,conclusions and policy recommendations are put forward.The innovation of this paper is as follows: First,it takes G20 member countries as the research theme,analyzes and compares developed economies and developing economies;Secondly,the innovation in the statistical measurement of comprehensive trade competitiveness reflects the comprehensive trade competitiveness of G20 member countries from six aspects.This paper has enriched the research on trade competitiveness theoretically and proved that comprehensive trade competitiveness plays a positive role in promoting green development of G20 member countries in practice.Based on the empirical results,the main conclusions of this paper are as follows: First,according to the measurement results of GTFP of each member country,the GTFP of each member country shows an overall upward trend during the study period,but the growth rate of developing economies is slow,and the growth rate of developed economies is higher than that of developing economies.Second,the overall trade competitiveness of developed economies is higher than that of developing economies.Third,from the overall regression results,the comprehensive competitiveness of trade has a great contribution to the improvement of GTFP,which is mainly promoted by green technology progress(GTC). |