“…Literature review shows that productivity is linked to many influencing factors, starting with R&D spending and innovations (Lopez-Rodriguez and Martinez-Lopez, 2017; Minniti and Venturini, 2017), structural changes in the economy (Duguleana and Duguleana, 2016;Harada, 2015;Hartwig, 2015;Maudos et al, 2008;Padilla-Pérez and Villarreal, 2017), ecological perspective (Yörük and Zaim, 2005;Mahlberg et al, 2011), industry innovation and productivity (Ivanova et al, 2017) and even quality management systems (Albulescu et al, 2016). Factors that influence productivity are related to technologies, knowledge, exclusive resources (specific natural resources), prices of the resources (labour, electricity etc.…”