5 IZA Discussion Papers
IZA Discussion Paper No. 18246
IZA Discussion Paper No. 15353
IZA Discussion Paper No. 3907
revised version published as 'The Effect of Delaying Motherhood on the Second Childbirth in Europe' in: Journal of Population Economics, 2011, 25 (1), 291-321
IZA Discussion Paper No. 1111
revised version published in: Labour, 2005, 19 (s1), 79–121