First Author:   Stephane Caprice Toulouse School of Economics, INRA, University of Toulouse Capitole, Toulouse, France stephane.caprice@inra.fr         https://www.tse-fr.eu/fr/people/stephane-caprice Second Author: Shiva Shekhar Düsseldorf Intitute for Competition Economics (DICE), Heinrich-Heine-Universität shekhar@dice.hhu.de