| 
	
	
		 First Author:
  | 
	
	
		|   | 
	
	
		| Maxence  Miéra  | 
	
	
		| Univ. Artois, LEM-CNRS (UMR 9221) | 
	
	
		| maxence.miera@univ-artois.fr | 
	
	
		|   | 
	
	
		| UFR EGASS, UFR EGASS, 9 rue du Temple | 
	
	
		| Arras Cedex, 62030, France. | 
	
	
		|   | 
	
	
		| 0659611888(Phone) | 
	
	
		| 0659611888(Fax) | 
	
	
		 | 
	
	
	
		Second Author:
 
  | 
	
	
		| Sophie  Massin  | 
	
	
		| Univ. Artois, LEM-CNRS (UMR 9221) | 
	
	
		| sophie.massin@univ-artois.fr | 
	
	
		|   | 
	
	
		 | 
	
	
		 | 
	
	
		|    | 
	
	
		|   | 
	
	
		|   | 
	
	
		 | 
	
	
		 |