List of Articles تمرکز بازار Open Access Article Abstract Page Full-Text 1 - The relationship between concentration, mark-up and stock returns (Case Study: Tehran Stock Exchange) Mohammadnabi Shahiki tash Ali darikandeh Mohamad Rasoul Heshmati Seyed-Hasan Hosseini Open Access Article Abstract Page Full-Text 2 - Investigating Price Asymmetry in Market of Iran’s Sugar Imports Farshid Eshraghi Shayesteh Akbari Ramtin Joolaie