Motivated by papers and recent talks on monetary values versus social values, I have great interest in studying how social values or corporate social responsibility (“CSR”) could impact firm values. Recent studies have shown that there are mainly three potential channels, through which CSR affects firm value. Firstly, employees help create firm value. Employee welfare is part of CSR (measured by MSCI ESG KLD Statistics, known as KLD scores), and employee satisfaction improves firm value shown by positive long-term abnormal stock market returns. (eg. Edmans 2011) Secondly, customers strongly link to firm value. Product quality and safety are part of CSR, and product characteristics are the main reasons directly linked to customer purchasing decisions, especially for firms in manufacturing and retail industries. Moreover, part of the customers may be socially conscious and are sensitive to firms’ actions towards environmental, community or human rights issues. They may form updated opinion of the firm based on their CSR activities and thus influence their purchasing decisions. Papers find that firms with more customer awareness benefit more from CSR. (eg. Servaes and Tamayo 2013) Thirdly, investors are associated with firm value. Investors, especially socially-conscious investors help discipline the firms’ CSR activities. Shareholder proposal is one good venue where they raise their voice and engage in the firms. Investors could use exit strategy to sell their shares, and changes in investment flows could affect firms’ value. (eg. Bialkowski & Starks 2016) The third channel, investors’ engagements in CSR issues in the firm and their association with firm value implications, as well as the related SRI investment performance are the main focus of this dissertation.