“…Environmental collaboration (Horbach et al, 2012;Wagner, 2007), green skills (Cainelli, Mazzanti, & Montresor, 2012), market pressure (Nesta, Vona, & Nicolli, 2014;Ziegler & Rennings, 2004), and export behavior (Christmann & Taylor, 2001; Lanoie, Laurent-Lucchetti, Johnstone, & Ambec, 2011) are positively and directly related to EI. However, scholars have often argued that there was an intermediate driver that mediated these relationships (see, e.g., Del Río, Carrillo-Hermosilla, et al, 2016, Valero-Gil et al, 2017, and this is also suggested by our interviewees, who confirmed that these EI drivers congregated the resources and capabilities of the firms via environmental strategies to promote EI. 4 Thus, because environmental strategy is a key variable that mediates the relationship between different drivers and EI, the focus in this paper is precisely on such mediating role.…”