“…However, recent literature revels a dual perspective on the relation between firm size and R&D efforts. As we said previously, some authors detected a positive relation between larger firms and innovation, because of improved access to human, financial resources and profit persistence (Bayona et al,2013;Karantininis et al, 2010;Laforet, 2008;Lin & Lin, 2012;Naranjo-Gil, 2009;Segarra & Arauzo, 2008;Hirch & Gschwandter, 2013;Triguero et al, 2013). On the contrary, other authors underline the ability of SMEs firms to innovate, based on their flexibility, interpersonal communication, etc (Bayona et al, 2001;;O'Regan et al, 2005;Maravelakis et al, 2006;Pla-Barber & Alegre, 2007;Alarcón & Sánchez, 2013).…”