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		| Beatrice  Durand-Megret | 
	
		| Leonard de Vinci Pole Universitaire, Research Center, 92916 Paris La Defense, France | 
	
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		| 8, rue Moliere | 
	
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		| Courbevoie,  92400 | 
	
		| France | 
	
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		| bdurandmegret@gmail.com | 
	
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		| JEL Areas: M3 : Marketing and Advertising: General
 L1 : Market Structure, Firm Strategy, and Market Performance: General
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