“…The board of directors plays a key corporate governance role in strategic decisions, with the independent directors also being in charge of protecting minority interests (Fern andez-Temprano and Tejerina-Gaite, 2020) and they may also be a guarantee of firm decisions like firm innovation that may be perceived as highly risk by managers and large shareholders (Hern andez et al, 2010). Most previous studies on the relationship between independent directors and firm innovation have been carried out in countries with an Anglo-Saxon financial system, such as Australia (Valencia, 2018), US (Balsmeier et al, 2017;Belkacemi et al, 2021;Iyengar and Sundararajan, 2020;Jiraporn et al, 2017;Li and Rainville, 2021;Lu and Wang, 2018;Tai et al, 2018), UK (Garcia Osma, 2008;Rodrigues et al, 2020;Sena et al, 2018), and Asia (Ashwin et al, 2016;Berezinets et al, 2019;Chen et al, 2016;Chen and Hsu, 2009;Dong and Gou, 2010;Fu, 2019;Iren and Tee, 2018;Liao et al, 2019;Shapiro et al, 2015;Sharma et al, 2018;Suman and Singh, 2020;Takahiro, 2015;Wang, 2021;Zhang, 2022). The empirical evidence for Europe is more limited (Attia et al, 2021;Rossi and Cebula, 2015;Wincent et al, 2012) and, as far as Spain is concerned, to our knowledge, there are only two studies: Gonzales-Bustos and Hern andez-Lara (2014) and Gonzales-Bustos et al (2020) [3].…”