3 IZA Discussion Papers
IZA Discussion Paper No. 8326
published in Journal of the Asia Pacific Economy, 2015, 20, 594–612
IZA Discussion Paper No. 5124
published in: Economic Journal, 2012, 122 (560), 339 - 375
IZA Discussion Paper No. 3926
published in: Journal of Development Economics, 2011, 95 (1), 18-29