“…Similar results are found in terms of R&D as indicator of sales growth, while it is claimed that the amount invested needs to surpass a certain benchmark to become effective (Morbey, 1988). More precisely, it is proposed that R&D intensity improves performance only up to a certain level of investment, while after a particular threshold, decreasing returns are expected (Yeh, Chu, Sher, & Chiu, 2010). Nevertheless, with respect to a study of the top spending European companies, higher levels of R&D investments are shown to lead to superior sales growth (Garciá-Manjoń & Romero-Merino, 2012).…”