3 IZA Discussion Papers
IZA Discussion Paper No. 15076
IZA Discussion Paper No. 9361
published in: Agricultural Economics, 2020, 51(4), 489-638
IZA Discussion Paper No. 660
revised version published as "A Comparative Study of the Employer Size Wage Effect in Africa" in: Journal of Economic Development, 2004, 29 (1), 137-161