Pierrevon Mouche (1959) studied theoretical physics, mathematics and astronomyat the University of Nijmegen. He received his PhD in mathematics from theUniversity of Utrecht under the supervision of Hans Duistermaat. Since1989 he holds a position in economics at Wageningen University. Hisscientific interest include mathematical economics and in particular theequilibrium structure of games in strategic form.Federico Quartieri (1979) studied economics at the University ofFlorence. He received his PhD in economics from the University of Siena.Since 2014 he holds a position in mathematical economics at the UniversityFederico II of Naples. His scientific interest include mathematical economicsand game theory.