List of Articles تحقیق و توسعه Open Access Article Abstract Page Full-Text 1 - The Investigation of the Effect of Research and Development on the Iran׳s Industrial Sector Productivity Abolfazll Shahabadi Omid Rahmani Open Access Article Abstract Page Full-Text 2 - Cuncurent engineering for mass production of products from Research and Development projects Mohammad forozandeh Open Access Article Abstract Page Full-Text 3 - Identifying the effective components on the level of technological complexity of research and development in knowledge-based companies using the grounded theory methodbased companies Gholamali shahmoradi taghi torabi Reza Radfar mohammadhasan cheraghali 10.61186/jstpi.39877.20.79.63