Greiff, MatthiasMatthiasGreiff2021-12-102021-12-102013https://jlupub.ub.uni-giessen.de/handle/jlupub/489http://dx.doi.org/10.22029/jlupub-418enClose relationshipsendogenous social preferencessocial tiesconditional cooperationddc:100ddc:330Affective Social Ties without the Need to Belong?