4 IZA Discussion Papers
IZA Discussion Paper No. 16639
IZA Discussion Paper No. 12828
IZA Discussion Paper No. 12072
revised version published as 'Preschoolers' self-regulation and early mathematical skill differentials' in: Education Economics, 2021, 29(2), 173-193
IZA Discussion Paper No. 1195
published in: International Tax and Public Finance, 2007, 14 (1), 7-27