17.562 IZA Discussion Papers
IZA Discussion Paper No. 2
published in: R. Faini / J. de Melo / K. F. Zimmermann (eds.), Migration. The Controversies and the Evidence, Cambridge, 1999, 296-327
IZA Discussion Paper No. 1
published in: Applied Economics, 1998, 30 (11), 1413-1420