推动环境信息披露能改善投资效率吗？

落实企业环境责任,推动环境信息披露,有利于推动结构调整和高质量发展。本文根据《环境信息公开办法（试行）》,对发布企业社会责任报告的上市公司环境信息披露进行刻画,基于Richardson投资期望模型对投资效率进行测度,分析环境信息披露对上市公司投资效率的影响。研究发现,环境信息披露能在一定程度上缓解投资不足,但对过度投资的影响并不显著,而且环境信息披露对投资不足的缓解作用在国有企业、两权分离度高等代理成本较高的企业中表现更为显著。本文因此提出推动环境信息披露的建议,一方面发挥政府作用,加大监管压力,确保企业环境责任的落实,健全环境治理企业责任体系;另一方面发挥市场的决定性作用,强化诱致企业披露环境信息的动力,让市场形成对环境信息披露的强需求,促使企业提升环境信息披露水平。     

End-of-pipe or process-integrated： evidence from LMDI decomposition of China＇s SO2 emission density reduction

In this study, reduction in sulfur dioxide （SO2） emission is decomposed into three parts： source preven- tion, process control and end-of-pipe treatment, using the Logarithmic Mean Divisia Index method （LMDI）. Source prevention and process control are defined as process- integrated treatment. It is found that from 2001 to 2010 the reduction of SO2 emission density in China was mainly contributed by end-of-pipe treatment. From the 10th Five Year Plan （FYP） period （2001-2005） to the llth FYP period （2006-2010）, the Chinese government has attempted to enhance process-integrated treatment. How- ever, given its initial effort, the effect is limited compared with that of the end-of-pipe treatment. The effectiveness of environmental regulation and technology in the reduction of SO2 density in 30 provinces （municipality/autonomous regions） from 2001 to 2010 is also investigated. This implies that environmental regulation and technology promote process control and end-of-pipe treatment sig- nificantly, but does not influence source prevention. Furthermore, environmental technology will only take effect under the circumstances of stringent environmental regulation. Therefore, to fulfill the whole process treat- ment, environmental regulation should be strengthened and environmental technology upgraded at the same time.     

如何利用水环境资源承载力确定城市规模研究——以天府新区为例

以水环境承载力的概念及内涵为基础,研究了天府新区规划初期水资源可持续利用的条件,并基于最大纳污量计算了可承载的区域人口和社会经济规模,为天府新区的区域整体发展规划提供依据.在天府新区新的发展目标下,论述了消除或缓解水资源的压力措施,即:改善和提高水资源管理水平甚至宏观社会经济决策水平,改善当地水资源承载状态,提高当地水资源系统对未来社会、经济、人口和生态环境的承载力.