43 IZA Discussion Papers
IZA Discussion Paper No. 1331
published in : Economic Theory, 2008, 34 (1), 107-125
IZA Discussion Paper No. 1321
published in: Research in Labor Economics, 2010, 30, 155-187
IZA Discussion Paper No. 1101
published in: Oxford Bulletin of Economics and Statistics, 2007, 69 (6), 819-842