3 IZA Discussion Papers
IZA Discussion Paper No. 4457
revised version published in Research in Labor Economics, Volume 39: Safety Nets and Benefit Dependence, 2014, 39 - 77
IZA Discussion Paper No. 4183
revised version published in Labour Economics 2013, 23, 122-134.
IZA Discussion Paper No. 3765
Revised version: IZA DP 4457