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基于2005-2012年38家低碳上市公司数据,本文运用随机前沿模型(SFA)测算各家上市公司的技术效率及其差异性特征,检验低碳企业技术效率的收敛特性。研究结果表明,我国低碳企业技术效率的整体水平偏低,均值仅为0.5027,企业间技术效率差异性显著并持续存在;低碳企业技术效率存在明显的σ收敛和β收敛,并且各企业也表现出明显的俱乐部收敛特征,其中σ收敛呈现出阶段性的波动特征。
Based on the data of 38 low-carbon listed companies from 2005 to 2012, this paper uses the stochastic frontier model (SFA) to calculate the technical efficiency and the difference characteristics of listed companies and examines the convergence of technical efficiency of low-carbon enterprises. The results show that the overall level of technical efficiency of low-carbon enterprises in our country is low, with an average of only 0.5027. There are significant and persistent differences in technical efficiency among enterprises. Significant σ convergence and β convergence exist in technical efficiency of low-carbon enterprises, and enterprises Showing a clear club convergence characteristics, in which the σ convergence showed a periodic fluctuation characteristics.