4 IZA Discussion Papers
IZA Discussion Paper No. 8420
published in: IZA Journal of Labor Economics, 2015, 4, 1-16.
IZA Discussion Paper No. 3608
published in: Zeitschrift für ArbeitsmarktForschung/Journal of Labor Market Research, 2011, 44(3), 231-244
IZA Discussion Paper No. 1188
published in: Industrial Relations, 2006, 45 (1), 1-25
IZA Discussion Paper No. 455
published in: Phanindra V. Wunnava (ed.), The Changing Role of Unions: New Forms of Representation, Armonk, N.Y.: M.E. Sharpe, April 2004