[1] Univ Aveiro, Dept Econ DEGEIT, GOVCOPP, Aveiro, Portugal
[2] Yasar Univ, Fac Business, Izmir, Turkiye
[3] Abdullah Gul Univ, Dept Econ, Kayseri, Turkiye
[4] King Fahd Univ Petr & Minerals, Interdisciplinary Res Ctr Renewable Energy & Power, Dhahran, Saudi Arabia
[5] Univ Thessaly, Dept Accounting & Finance, Volos, Greece