3 IZA Discussion Papers
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. 6355
published in: Journal of Economics and Statistics, 2013, 233 (3), 406-422
IZA Discussion Paper No. 2882
published in: Labour Economics, 2008, 15 (4), 631-646