ÖZER, Gökhan, İlhan ÇAM, and Muhammet KOCAMAN. “THE NONLINEAR IMPACT OF RESEARCH AND DEVELOPMENT INVESTMENTS ON FIRM PERFORMANCE: A SIGMOID (S) CURVE APPROACH IN G20 COUNTRIES”. SSD Journal 8, no. 39 (September 15, 2023): 299–321. Accessed November 24, 2024. https://ssdjournal.org/index.php/pub/article/view/505.