国家生态工业示范园对企业绿色创新的影响研究

Research on the Impact of National Demonstration Eco-industrial Parks on Enterprises' Green Innovation?

中文关键词:  国家生态工业示范园  企业绿色创新  波特假说  环境规制  准自然实验  生态工业园

英文关键词:national demonstration eco-industrial park  corporate green innovation  the Porter hypothesis  environmental regulation  quasi-natural experiment  eco-industrial park

中文摘要:

      国家生态工业示范园是中国工业绿色转型的主要载体。本文基于创建国家生态工业示范园为切入点，采用多期双重差分法（difference-in-differences, DID）和2002-2017年上市公司的面板数据，实证考察了国家生态工业示范园对企业绿色创新的影响。研究发现：①创建国家生态工业示范园显著促进了企业绿色创新，平均提升了上市公司绿色发明专利0.883项，绿色实用专利0.465项；②事件分析表明，国家生态工业示范园与企业绿色创新之间存在着“先增后降”的倒“U”形关系；③国家生态工业示范园显著增加了企业环保投资，抑制了企业排污费，但与政府环保补助之间没有必然联系；④国家生态工业示范园更有助于非国有企业、经营状况比较好的企业以及东部经济发达地区的企业绿色创新，并且其绿色创新效应不集中于特定行业（如重污染行业）。本文从微观企业层面为理解创建国家生态工业示范园的经济社会效益提供了启发。

英文摘要:

      National demonstration eco-industrial park (EIP) is the leading carrier of China's industrial green transformation. This study empirically investigated the association between EIPs and corporate green innovation by constructing EIPs as the entry point, using the multi-period difference-in-differences (DID) and panel data of listed companies from 2002-2017. The study found that: ①The creation of the EIPs significantly promoted corporate green innovation, raising the average number of listed companies' green invention patents by 0.883 and green utility patents by 0.465. ② The event study analysis showed an inverted U-shaped relationship between the EIPs and the corporate green innovation, with "first increase and then decrease." ③The EIPs significantly increased corporate investment in environmental protection. They curbed corporate emissions charges, but there was no necessary link between the EIPs and government environmental subsidies. ④ EIPs were more helpful to non-state corporates, corporates with better business conditions, and corporates in the economically developed eastern regions for green innovation. The effects of green innovation were not concentrated in specific industries (e.g., heavy pollution). This paper might provide insights into the economic and social benefits of EIPs at the micro-corporate level.