List of Articles زنجیره ارزش جهانی Open Access Article Abstract Page Full-Text 1 - The Role and Status of Upgrading Techniques in Global Value Chains Zahra Ayagh Mahsa Farkhondeh Esmaeil Malek Akhlagh Open Access Article Abstract Page Full-Text 2 - A Systematic Review of the Technological Catch-up Concept Growth علی بنيادی نائينی Ebrahim Souzanchi Kashani Hosein Gholizadeh 10.61186/jstpi.36880.20.78.74