2 IZA Discussion Papers
IZA Discussion Paper No. 4109
published in: Jorge Durand and Jorge A. Schiavon (eds.), Perspectivas migratorias: Un análisis interdisciplinario de la migración internacional, Mexico: CIDE, 2010.
IZA Discussion Paper No. 1115
published in: Review of Economics and Statistics, 2006, 88 (3), 510-530