3 IZA Discussion Papers
IZA Discussion Paper No. 8872
IZA Discussion Paper No. 4621
published in: Ian Jarvie and Jesus Zamora-Bonilla (eds.), The SAGE Handbook of the Philosophy of Social Science, London: Sage Publications, 2011.
IZA Discussion Paper No. 3859
published in: Review of Economic Studies, 2009, 76, 1239-1267