4 IZA Discussion Papers
IZA Discussion Paper No. 15374
IZA Discussion Paper No. 10131
published in: A. Heshmati (ed.), Studies on Economic Development and Growth in Selected African Countries, Springer, 2017
IZA Discussion Paper No. 3309
published in: Australian Economic Review, 2008, 41 (2), 160-176
IZA Discussion Paper No. 5
published in: Labour Economics, 1999, 6 (2), 229-251