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First Author:
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| François-Charles Wolff |
| LEN, University of Nantes CNAV and INED, Paris |
| wolff@sc-eco.univ-nantes.fr |
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| http://www.sc-eco.univ-nantes.fr/~fcwolff |
Second Author:
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| Christine Barnet-Verzat |
| LEN, University of Nantes |
| christine.barnet@univ-nantes.fr |
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