title: Need for conclusive evidence that positive and negative reciprocity are unrelated.
authors: Boris
authors: B
authors: Egloff
authors: David
authors: D
authors: Richter
authors: Stefan C
authors: SC
authors: Schmukle
mesh_terms: D003299:Cooperative Behavior; D005260:Female; D005716:Game Theory; D006801:Humans; D008297:Male; D008960:Models, Psychological
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