1Tim De Feyter1*and Marie-Anne Guerry2**
Centre for Corporate Sustainability, Hogeschool-Universiteit Brussel,
K.U.Leuven Association, Stormstraat 2, B-1000 Brussels, Belgium 2
Centre for Manpower Planning, MOSI, Vrije Universiteit Brussel,
Pleinlaan 2, B-1050 Brussels, Belgium