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First Author:
 
Marie-pierre Dargnies
Paris School of Economics, Université Paris 1
dargnies@univ-paris1.fr
 
CES 106-112 boulevard de l''Hôpital
Paris, 75013, France
 
 
 

Second Author:

Guillaume Hollard
Paris School of Economics, CNRS
guillaume.hollard@univ-paris1.fr