[1] Harokopio Univ, Dept Econ & Sustainable Dev, El Venizelou 70, Athens 17671, Greece
[2] Univ Aegean, Dept Environm, Ctr Environm Policy & Strateg Environm Management, Lesvos Island 81100, Greece
[3] Democritus Univ Thrace, Dept Environm Engn, Business & Environm Technol Econ Lab, Xanthi 67100, Greece