“…Several studies investigated the impact of quality standards' adoption on the firms' performance, with an accent on financial results (Lafuente, Bayo-Moriones & García-Cestona, 2010;Heras-Saizarbitoria, Molina-Azorín & Dick, 2011;Ullah, Wei & Xie, 2014). Other studies focused on the role of quality certification on the labor productivity, assessing the role of environmental standards (Garcia-Pozo, Sánchez-Ollero & Marchante-Mera, 2014), safety standards (Abad, Lafuente & Vilajosana, 2013) or quality management standards (Ílkay & Aslan, 2012;Lakhal, 2014;Sánchez-Ollero, García-Pozo & Marchante-Lara, 2015).…”