Report (2012) - EJ Bartelsman (author), R Beetsma (author), H Garretsen (author), K Goudswaard (author), B. Jacobs (author), CG Koedijk (author), RO van der Ploeg (author), H. Priemus (author), D Schoenmaker (author), E Sterken (author), L Stevens (author), C de Vries (author), H Benink (author), H Wijffels (author), S Wijnbergen (author), P.J. Boelhouwer (author), A Boot (author), L Bovenberg (author), D Brounen (author), J Conijn (author), PMA Eichholtz (author), J Frijns (author)

Journal article (2002) - JBS Conijn (author), PMA Eichholtz (author), J Hakfoort (author), CG Koedijk (author)