“…So, firms increasingly look to develop an innovation activity that will differentiate them from other firms (Lev, 2001). R&D investment in intangible assets may contribute to the value added (Tsang et al, 2008) and the long-term sales growth (Anagnostopoulou and Levis, 2008;Bae and Noh, 2001;Chan et al, 2001;Chan et al, 2003). Moreover, such an investment may work as a barrier to entry for competitors, (Bae and Noh, 2001).…”