5 IZA Discussion Papers
IZA Discussion Paper No. 17062
IZA Discussion Paper No. 11252
IZA Discussion Paper No. 8453
published as: CEPS Working Document No. 399, Centre for European Policy Studies, Brussels, September
IZA Discussion Paper No. 5638
IZA Discussion Paper No. 5042
published in: Mathematical Population Studies, 2012, 19 (1), 51-62