Study on the transformation efficiency of China's non-ferrous metal industrial chain

Affected by the current economic situation and resource constraints, China's non-ferrous metal industry urgently needs to improve efficiency and accelerate transformation.Based on the research method of combining network DEA model and Malmquist index, panel data of 26 provinces in China from 2005 to 2016 are selected to calculate the overall and phased transformation efficiency and total factor productivity(MPI) changes in the non-ferrous metal smelting process.The results show that the technological progress, the change of pure technical efficiency and the change of scale efficiency of China's non-ferrous metal industry chain are all dominated by smelting and pressing stages.With the development of technology and the increase of scale effect, the pure technical efficiency of the industrial chain declines.It shows that the transformation efficiency of non-ferrous metal industry chain is mainly affected by the smelting and pressing stage.Only relying on technology and scale cannot effectively promote industrial transformation, and enterprises need to improve comprehensive capacity from multiple perspectives to promote efficient development.