383 IZA Discussion Papers
IZA Discussion Paper No. 128
published in: Journal of Econometrics, 2005, 125 (1-2), 53-75
IZA Discussion Paper No. 116
published in: Journal of Applied Econometrics, 2001,16 (5), 619-636
IZA Discussion Paper No. 108
published in: Journal of Institutional and Theoretical Economics, 2006, 162 (2), 227-252