张忻珍 陈婉琳 黄加顺
摘要： “促进生态文明建设” 与“加强国际合作”是新时期我国外贸发展的两大基本要求，环境政策与贸易政策也成为了影响我国出口贸易的两个重要因素。本文以2003年国务院发布重要文件《关于大气污染防治重点城市限期达标工作的通知》为一次准自然实验，通过双重差分法来分析环境规制、贸易自由化对出口国内附加值率的影响，并从多方面进行了异质性分析。本文发现：环境规制对企业出口国内附加值有正向的促进作用，支持了波特假说；规模较大的企业、加工贸易企业、处于高技术行业的企业、东部地区企业的出口国内附加值受到环境规制的促进作用更为显著。本文还进一步讨论了贸易自由化的作用，并发现贸易自由化水平越高，环境规制强度对企业出口国内附加值的促进效应越显著。
【关键词】出口国内附加值率；环境规制；贸易自由化；波特假说
【作 者】张忻珍,中国科学技术大学公共事务学院研究生；陈婉琳，伦敦大学学院巴特利特环境、能源和资源学院，中国科学技术大学公共事务学院研究助理；黄加顺，中国科学技术大学公共事务学院副研究员，哈佛大学法学院劳动与经济项目高级研究员。
【Title】Environmental Regulations and Export Domestic Added Value
Abstract:"Promoting ecological civilization construction" and "strengthening international cooperation" are two critical requirements of China's international trade development in the new era. Environmental policy and trade policy have also become two important factors affecting China's export trade. Based on the “Notice on the Deadline for Compliance of Key Cities in the Prevention and Control of Air Pollution” by The State Council in 2003, we employ a quasi-natural experiment to analyze the impact of environmental regulation and trade liberalization on the export domestic value-added rate through the difference-in-differences approach, and we conduct heterogeneity analyses from different aspects. We find that environmental regulations have a positive promoting effect on the domestic added value of enterprises' export, which supports Porter Hypothesis；the export value-added rate of large-scale enterprises, processing trade enterprises, enterprises in high-tech industries, and enterprises in eastern China are more significantly promoted by environmental regulations. After further discussing the role of trade liberalization, we find that trade liberalization can enhance the impact of environmental regulations on export domestic value-added rate.
Key Words: Export domestic value-added rate, Environmental regulations，Trade liberalization, Porter Hypothesis