4 IZA Policy Papers
IZA Policy Paper No. 206
IZA Policy Paper No. 176
IZA Policy Paper No. 167
IZA Policy Paper No. 68
published in: Co-operatives in a Post-Growth Era: Creating Co-operative Economics, Sonja Novkovic and Tom Webb, eds., pages 221-241, 2014, Zed Books (Distributed by University of Chicago Press)