65 IZA Discussion Papers
IZA Discussion Paper No. 849
IZA Discussion Paper No. 712
published in: P. Hammerstein (ed.), Genetic and Cultural Evolution of Cooperation, Cambridge: MIT Press, 2004
IZA Discussion Paper No. 621
published in: Journal of Theoretical Biology, 2007, 247, 397- 412,
IZA Discussion Paper No. 621
published in: Journal of Theoretical Biology, 2007, 247, 397- 412,
IZA Discussion Paper No. 585
revised version published in: American Economic Review, 2005, 95 (5), 1653-1672