List of Articles شکاف فناوری Open Access Article Abstract Page Full-Text 1 - Technological catch-up A sustainable approach to gaining a competitive advantage(Case study of Iranian petrochemical industry) Abolghasem Farsi manochehr manteghi hasan Farsijani Changiz Valmohammadi Open Access Article Abstract Page Full-Text 2 - Effective factors of expenditures domestic research and development and spillovers R&D trading partners of imports channel of the agricultural sector in Iran ابوالفضل sh فریبا مهری تلیایی Open Access Article Abstract Page Full-Text 3 - Investigation of Energy Technology Gap Ratio of Main Crops in Sari city رضا اسفنجاری کناری محمود احمدپور احمد علی کیخا Open Access Article Abstract Page Full-Text 4 - Estimation of the technological gap ratio of different rice varieties in Guilan province Reza Esfanjari Kenari Seyedeh Sodabeh Hashemi Chafchiri Mohamad Hosein Menhaj 10.30495/jae.2022.24379.2145