85 IZA Discussion Papers
IZA Discussion Paper No. 497
IZA Discussion Paper No. 454
revised version published in: Berkeley Electronic Journal in Macroeconomics: Contributions to Macroeconomics, 2007, 7(1), Article 5
IZA Discussion Paper No. 390
IZA Discussion Paper No. 358
published in: FinanzArchiv, 2001, 58 (1),78-102
IZA Discussion Paper No. 241