Iranian Financial Engineering Association(IFEA) International Journal of Finance & Managerial Accounting 2588-4379 9 33 2024 04 01 Environmental Uncertainty and R&D Investment: Moderator role Of Product Market Competition 129 138 22027 10.30495/ijfma.2023.65283.1786 EN Mehdi Maranjory Department of Accounting, chalous Branch, Islamic Azad University, chalous, Iran. 0000-0002-9952-5020 Journal Article 2022 01 06 Surviving in highly competitive industries and attaining sustainable market growth require firms to continuously invest in R&D projects in order to innovate in products and technology. Literature shows that R&D investment can be significantly influenced by uncertainties in a firm’s external and internal environments. The purpose of this study is determining the role of product market competition on relation between environmental uncertainty and R&D Investment. The present research is of practical type in terms of purpose and has descriptive- correlational nature. The statistic population includes all active firms in Tehran securities market between 2013 to 2019. By using systematic removal method, 122 firms were chosen as sample. In order to investigate the relation between research variables, multivariate regression has been used. The results indicated that there is a negative and significant relation between environmental uncertainty and R&D Investment in Tehran securities market. Also, the product market competition negative relation between environmental uncertainty and R&D Investment will strengthen it. http://www.ijfma.ir/article_22027_12f743edf866f7a7ff81368543dcd1a1.pdf