Hans-Werner Sinn, Erkki Koskla, Ronnie Schöb
German Economic Review 2, 2001, S. 19-30, NBER Working Paper Nr. 6922, Februar 1999, CEPR Discussion Paper Nr. 2089, Dezember 1999.
NBER Working Paper Nr. 6922 (PDF)334.83 KB
CEPR Discussion Paper Nr. 2089 (PDF)264.82 KB