7 IZA Discussion Papers
IZA Discussion Paper No. 13817
IZA Discussion Paper No. 12601
IZA Discussion Paper No. 10007
IZA Discussion Paper No. 9079
published as "More Skilled, Better Paid: Labour-market Returns to Vocational Postsecondary Education" in: Oxford Economic Papers, 2018, 70 (2), 485-508
IZA Discussion Paper No. 8474
IZA Discussion Paper No. 7319
IZA Discussion Paper No. 5620
published in: Economics of Education Review, 2014, 41, 71-88