 In his research, he studies the linguistic situation in Switzerland and in the European Union and its economic consequences.He is the author of a 2005 report entitled "L'enseignement des langues étrangères comme politique publique" (The teaching of foreign languages as a public policy), best known as Grin's Report.In this document, Grin indicates that the choice of Esperanto as a bridge language for Europe would lead to an annual saving of 25 billion euros.