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First Author:
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| François-Charles Wolff |
| LEN-CEBS, Université de Nantes Cnav and Ined, Paris, France |
| wolff@sc-eco.univ-nantes.fr |
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| BP 52231 Chemin de la Censive du Tertre |
| Nantes, 44322, France |
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Second Author:
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| Mohamed Jellal |
| Université Mohammed V, Rabat, Morroco ESC Toulouse and Conseils-Eco, France |
| jellalmohamed@yahoo.fr |
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Third Author:
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| Khaled Bouabdallah |
| Université Jean Monnet, Saint-Etienne |
| bouabdallah@gate.cnrs.fr |
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