1. University of Coimbra Institute for Legal Research (UCILeR), University of Coimbra, 3000-018 Coimbra, Portugal
2. Faculty of Economics, University of Coimbra, 3004-512 Coimbra, Portugal
3. Centre for Business and Economics Research (CeBER), University of Coimbra, 3004-512 Coimbra, Portugal
4. Department of Mechanical Engineering, Faculty of Science and Technology of the University of Coimbra, Campus II, University of Coimbra, 3030-788 Coimbra, Portugal
5. Department of Economics, Faculty of Economics and Administrative Sciences, Zonguldak Bülent Ecevit University, İncivez, Zonguldak 67100, Turkey