List of Articles Z19 Open Access Article Abstract Page Full-Text 1 - The relationship between tourism and foreign direct investment in developing countries (approach causality panel data) داوود Behbod فرانک Bastan Open Access Article Abstract Page Full-Text 2 - Factors affecting tourism: combining econometric methods and dynamic systems نعمت Falihi بهروز Jafarzadeh Open Access Article Abstract Page Full-Text 3 - Measuring the Economic Efficiencies and Productivity of Natural Gas Refineries in Iran علی امامی تیمور محمدی عارف بهروز