2 IZA Discussion Papers
IZA Discussion Paper No. 138
published as 'On-the-job-training, job search and job mobility' in: Schweizerische Zeitschrift für Nationalökonomie und Statistik / Swiss Journal of Economics and Statistics, 2003, 139 (4), 563-576
IZA Discussion Paper No. 51
published in: Industrial and Labor Relations Review, 2001, 54 (3), 647-662