3 IZA Discussion Papers
IZA Discussion Paper No. 5335
published in: Economic Journal, 2013, 123, 1236-1278.
IZA Discussion Paper No. 2680
IZA Discussion Paper No. 948
published in: J. Messina, C. Michelacci, J. Turunen and G. Zoega (eds.), Labour Market Adjustments in Europe, Edward Elgar 2006