3 IZA Discussion Papers
IZA Discussion Paper No. 5205
published in: Economic Modelling, 2010, 27 (6), Special Issue: P.A.V.B Swamy, 1355-1367
IZA Discussion Paper No. 2761
published in: Empirical Economics, 2013, 44(1), 135-161
IZA Discussion Paper No. 700