4 IZA Discussion Papers
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