This paper uses fixed effect model to study the relation between ownership and social responsibilities of 2010 to 2018 listed companies, and analyzes its changes under separation of owning and controlling rights from perspective of company management. An ownership centralization constrains companies' social responsibilities, but a balancing ownership exerts an upside-down "U-shaped" impact, a non-linear relation, suggesting a higher centralization, a poor social responsibility. Higher or lower balancing rights are not favorable for development of companies' social responsibilities. Separation of centralizing and balancing rights can largely adjust their relation. A higher centralized ownership plays a stronger role in constraining social responsibilities, and the upside-down "U-shaped" relation is boosted if the two rights are highly separated. This paper verifies their non-linear relation between ownership and social responsibilities, balancing ownership plays a dual role in companies' social responsibilities, a higher centralization is harmful for social responsibilities, providing references for China's companies to improve their social responsibilities and enriching the research content of ownership structure and social responsibilities.

This paper uses references and PMC index model to establish an evaluation system based on 10 typical cases of water pollution control policies, which have been evaluated according to PMC index and PMC stereoscopic surface, aiming at offering references for high-quality green development and coordinated human\|water environment. Among the policies, 1 is perfect, 5 are excellent and the rest are acceptable. Their average PMC index is 8.17, suggesting a generally rational water pollution control policy design in China. This paper presents suggestions on optimizing water pollution control policies based on China's actual water ecological management from government-oriented mutual management, laws and supervision, increasing governmental and market capital input and intensifying technical supports, constructing balanced policy system, and encouraging diversified involvement and boosting ecological culture propaganda.