Abstract: In order to objectively evaluate the contribution made by government-backed enterprises in the field of energy conservation and environmental protection, and to identify unequal market and social responsibility of enterprises, this paper uses crawler technology to collect the data of enterprises with more than 80% output value in China’s environmental protection industry. text analysis technology is adopted to identify three-layer equity penetration relationship, which explore and measure the potential government background in every enterprise. Then, by counterfactual matching method, the market mark-up caused by government background is verified and measured. Further, this study judges the market mark-up represents unequal market status or more social responsibility borne. Data analysis shows that both the social responsibility borne and unequal market status exist, which differs greatly among cites. Finally, this study prove the impact of market mark-up on the all enterprises efficiency: unequal market status damages the efficiency of all enterprises, while the social responsibility of government-backed enterprises improves the efficiency of non-government-backed enterprises.

Key words: environment protection industry, government-background, market position, market mark-up, enterprise social responsibility, counterfactual match