Research on Green Efficiency of Technological Innovation of New Energy Enterprises Based on Unexpected Outputs
Taking the new energy listed enterprises in China from 2007 to 2020 as the research object,carbon emission intensity is introduced as the non-expected output,utilize the DEA-SBM model,distinguish between R&D and translation stages,and between regional and ownership hetero-geneity,comprehensively examine the green efficiency of technological innovation.The results show that the level of green efficiency of technological innovation in new energy listed enterprises is low,lower in the R&D stage(0.061)than in the transformation stage(0.221),which indicates that technological innovation R&D is facing a greater risk of failure,but the efficiency improves when it is applied.Heterogeneity analysis shows that the efficiency of western regions and state-owned enter-prises is higher than other classifications in both the R&D and transformation stages,but the gap is not significant in the transformation stage.Therefore,the government and the market should support R&D activities in regions with advantages in technological innovation,and other regions can expand the transformation market according to local conditions;at the same time,state-owned enterprises should be called upon to overcome difficulties in urgent and difficult areas and lead the way to im-prove the green efficiency of overall technological innovation in the new energy industry.