IZA Publications
IZA Discussion Paper No. 1029
published in: Journal of Economic Integration, 2003, 18 (1), 60 - 104
IZA Discussion Paper No. 1028
published in: El Trimestre Economico, 2010, 302 (2)
IZA Discussion Paper No. 1027
published in: Review of International Economics, 2004, 12 (4), 630-642
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