1. Le Studium Fellow, Loire Valley Institute for Advanced Studies, Orléans and Tours, France
2. LEO (Laboratoire d'Economie d'Orléans) UMR7322, Faculté de Droit d'Economie et de Gestion, University of Orléans, Orléans, France
3. Faculty of Economics and Business Administration, West University of Timisoara, Timisoara, Romania