本篇研究旨在探討公司身為顧客對其供應商ESG決策之影響。本篇擷取路孚特資料庫(Refinitiv database) 相關資訊進行研究，發現顧客ESG分數與下一期供應商ESG分數呈現顯著正相關，近一步分析顯示當顧客屬於供應商重大顧客時，此正向關聯有所增強，然而當供應商話語權相對較高時，此關聯則有所減弱。另外，本篇研究以總部地點將顧客分為歐美及非歐美兩大類，最終顯示發現總部地點對於顧客與供應商ESG分數之關聯並無顯著差異。既有文獻中對於顧客與供應商ESG決策之討論相對較少，本篇研究提供更為近期數據，佐證顧客確實能夠影響供應商後續ESG表現。

關鍵字：供應商顧客關係、環境社會公司治理決策

Customer-supplier relationships remain an important topic in global supply chains. We extract data from Refinitiv database to check if firms, acting as customers, awaken their suppliers' ESG consciousness and efforts through their own ESG improvements in ratings. Our results illustrate a positive correlation between customers' and suppliers' ESG scores, showing customers' ability to accelerate suppliers' ESG adoption and not affected by their locations, either western or eastern. The correlation is stronger when customers serve as major clients to their suppliers, but weaker when suppliers possess greater bargaining power in the industry. From the supply chain's perspective, we document new evidence and show collaborative ESG efforts in the global industries, providing another direction of ESG research in literature.

Keywords: Supplier-customer Relationships, ESG

Bae, K. H., El Ghoul, S., Gong, Z. J., & Guedhami, O. (2021). Does CSR matter in times of crisis? Evidence from the COVID-19 pandemic. Journal of Corporate Finance, 67, 101876. https://doi.org/10.1016/j.jcorpfin.2020.101876
Borghesi, R., Houston, J. F., & Naranjo, A. (2014b). Corporate socially responsible investments: CEO altruism, reputation, and shareholder interests. Journal of Corporate Finance, 26, 164–181. https://doi.org/10.1016/j.jcorpfin.2014.03.008
Boubakri, N., El Ghoul, S., Wang, H., Guedhami, O., & Kwok, C. C. (2016). Cross-listing and corporate social responsibility. Journal of Corporate Finance, 41, 123–138. https://doi.org/10.1016/j.jcorpfin.2016.08.008
Cai, Y., Pan, C. H., & Statman, M. (2016). Why do countries matter so much in corporate social performance? Journal of Corporate Finance, 41, 591–609. https://doi.org/10.1016/j.jcorpfin.2016.09.004
Cen, L., Dasgupta, S., Elkamhi, R., & Pungaliya, R. S. (2015). Reputation and Loan Contract Terms: The Role of Principal Customers. Social Science Research Network. https://doi.org/10.2139/ssrn.2415468
Chu, Y., Tian, X., & Wang, W. (2019). Corporate Innovation Along the Supply Chain. Management Science, 65(6), 2445–2466. https://doi.org/10.1287/mnsc.2017.2924
Cronqvist, H., & Yu, F. (2017). Shaped by their daughters: Executives, female socialization, and corporate social responsibility. Journal of Financial Economics, 126(3), 543–562. https://doi.org/10.1016/j.jfineco.2017.09.003
Dai, R., Liang, H., & Ng, L. (2021). Socially responsible corporate customers. Journal of Financial Economics, 142(2), 598–626. https://doi.org/10.1016/j.jfineco.2020.01.003
Dhaliwal, D. S., Judd, J. S., Serfling, M., & Shaikh, S. (2016). Customer concentration risk and the cost of equity capital. Journal of Accounting and Economics, 61(1), 23–48. https://doi.org/10.1016/j.jacceco.2015.03.005
Ding, W., Levine, R., Lin, C., & Xie, W. (2021). Corporate immunity to the COVID-19 pandemic. Journal of Financial Economics, 141(2), 802–830. https://doi.org/10.1016/j.jfineco.2021.03.005
Gillan, S. L., Koch, A., & Starks, L. T. (2021). Firms and social responsibility: A review of ESG and CSR research in corporate finance. Journal of Corporate Finance, 66, 101889. https://doi.org/10.1016/j.jcorpfin.2021.101889
Hertzel, M. G., Li, Z., Officer, M. S., & Rodgers, K. J. (2008). Inter-firm linkages and the wealth effects of financial distress along the supply chain☆. Journal of Financial Economics, 87(2), 374–387. https://doi.org/10.1016/j.jfineco.2007.01.005
Kale, J. R., & Shahrur, H. (2007). Corporate capital structure and the characteristics of suppliers and customers. Journal of Financial Economics, 83(2), 321–365. https://doi.org/10.1016/j.jfineco.2005.12.007
Liang, H., & Renneboog, L. (2017). On the Foundations of Corporate Social Responsibility. The Journal of Finance, 72(2), 853–910. https://doi.org/10.1111/jofi.12487
Lins, K. V., Servaes, H., & Tamayo, A. (2017). Social Capital, Trust, and Firm Performance: The Value of Corporate Social Responsibility during the Financial Crisis. The Journal of Finance, 72(4), 1785–1824. https://doi.org/10.1111/jofi.12505
McCarthy, S., Oliver, B., & Song, S. (2017). Corporate social responsibility and CEO confidence. Journal of Banking & Finance, 75, 280–291. https://doi.org/10.1016/j.jbankfin.2016.11.024