Is not helping a bad person good or bad?

A research team led by Hitoshi Yamamoto from Rissho University has analyzed how the social norm of indirect reciprocity is adopted in human society and revealed results that contradict previous theoretical predictions. The ...

How important is reciprocity for climate policy?

The Paris Agreement relies on voluntary and therefore weak commitments. But contrary to popular belief, if some countries "free-ride", this does not undermine the commitment of others, writes Thomas Bernauer.

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