“…The literature has proposed different aspects of firm complexity, including business segment complexity, geographical complexity, ownership complexity and structural complexity [7]. Previous studies have linked these aspects to return predictability (Cohen and Lou, 2012), parent's and subsidiaries' riskiness (Argim on and Rodr ıguez-Moreno, 2020), CEO labor market (Berry et al, 2006), board compensation (Bushman et al, 2004), firm value (Garc ıa-Meca and Pedro S anchez-Ballesta, 2011), knowledge performance and innovation (Pertusa-Ortega et al, 2010;Altomonte and Rungi, 2013) and borrowing costs (Li et al, 2011;Sikochi, 2020). In the case of structural complexity, most of these studies simply measure it by the number of subsidiaries (Cetorelli and Goldberg, 2014;Argim on and Rodr ıguez-Moreno, 2020;Sikochi, 2020).…”