43 IZA Discussion Papers
IZA Discussion Paper No. 1801
published in: Bulletin of Economic Research, 2006, 58 (1), 61–72
IZA Discussion Paper No. 1295
published as 'Effect of Secondary School Fees on Educational Attainment' in: Scandinavian Journal of Economics, 2012, 114 (1), 147 - 176
IZA Discussion Paper No. 1226
published in: Social Science Research, 2006, 35 (1), 60-87