“…For firm level performance, we investigate firms' sales growth, using empirical specifications from the industrial economics literature studying firm dynamics and explaining firm size distributions in developed and developing countries (Evans, 1987a(Evans, , 1987bSleuwaegen & Goedhuys, 2002;Sutton, 1997). This focus on sales growth and on domestically awarded certificates represents a novelty within the body of empirical literature on SMEs performance in Viet Nam, since empirical studies have, instead, looked at the effects of international certifications on other performance indicators, such as labour productivity (Calza, Goedhuys, & Trifković, 2019;Trifković, 2016), business risk (Trifković, 2018), work conditions (Trifković, 2017), and environmental performance (Nguyen & Hens, 2015).…”