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| Cristina Barbot |
| Faculty of Economics University of Porto |
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| Faculdade de Economia |
| Rua Dr. Roberto Frias |
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| , Porto 4200-464 |
| Portugal |
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| cbarbot@fep.up.pt |
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JEL Areas: L4 : Antitrust Issues and Policies: General L1 : Market Structure, Firm Strategy, and Market Performance: General |