“…With the growing concern about environmental protection among other stakeholders, informal environmental regulation has become an important monitoring role, which generally refers to strong environmental value norms and beliefs from diverse parties (e.g., the public, suppliers, and consumers) (Zhou et al, 2021). Prior literature discusses the role of green supplier engagement (Cheng, 2020; Zhao et al, 2021), foreign customers (Qi et al, 2013), foreign investors (Li et al, 2022), environmental nongovernmental organizations (Zhang & Huang, 2023). However, the results about whether informal regulation can promote GI are mixed, mainly including the positive view (Zhou et al, 2021) and negative view (Wang, Long, & Li, 2022).…”