Sekeroglu, G. and Karaboga, K. 2023. The effect of marketing and R&D expenditures on firm profitability and stock return: Evidence from BIST. An International Journal of Optimization and Control: Theories & Applications (IJOCTA). 13, 1 (Jan. 2023), 35–45. DOI:https://doi.org/10.11121/ijocta.2023.1238.