4 IZA Discussion Papers
IZA Discussion Paper No. 8065
IZA Discussion Paper No. 5695
IZA Discussion Paper No. 3192
published in: Review of Economics of the Household, 2008, 6 (4), 369-389
IZA Discussion Paper No. 1591
published in: Southern Economic Journal, 2007, 74 (2), 412-433