List of Articles regression Open Access Article Abstract Page Full-Text 1 - Investigating the asymmetric effects of exchange rate fluctuations on the gross domestic product with the quantile regression approach, a case study of Iran Negin Rahimi roya aleemran Hossein Panahi Hossein Asgharpur 10.30495/ECOMAG.1403.1045595 Open Access Article Abstract Page Full-Text 2 - Investigating the Relationship between Oil Prices and Stock Markets in Oil Exporting and Importing Countries by Using Quantile Regression Abouzar Gandomkar Seyyed Nematollah Mousavi Abbas Aminifard 10.30495/ECOMAG.1402.1045597 Open Access Article Abstract Page Full-Text 3 - Investigating the Return of Scale Indicators, Technological Changes and Growth of Production Factors on the Cost in Shazand City Water and Wastewater Company Majid Karkhaneh Ahmad Sarlak Kambiz Hozhbar Kiani