4 IZA Discussion Papers
IZA Discussion Paper No. 13322
IZA Discussion Paper No. 11756
IZA Discussion Paper No. 7537
published in: Oxford Economic Papers, 2015, 67 (4), 918-948
IZA Discussion Paper No. 5144
published as "The Role of Noncognitive Traits in Undergraduate Study Behaviours" in: Economics of Education Review, 2013, 32, 181-195