4 IZA Discussion Papers
IZA Discussion Paper No. 5143
IZA Discussion Paper No. 4606
published as 'Inference on an Extended Roy Model, with an Application to Schooling Decisions in France' in: Journal of Econometrics, 2013, 174 (2), 95–106
IZA Discussion Paper No. 1684
published in: German Economic Review, 2007, 8 (4), 468-509
IZA Discussion Paper No. 1042