4 IZA Discussion Papers
IZA Discussion Paper No. 12920
extended version published in: Journal of the Korean Statistical Society 2021
IZA Discussion Paper No. 2031
IZA Discussion Paper No. 1054
published in: Journal of the Japan Statistical Society, 2005, 35 (1), 99-119
IZA Discussion Paper No. 978
published in: Economics Letters, 2004, 85 (2), 229-234