Altruism toward others can hinder cooperation

Altruism toward others can inhibit cooperation by increasing the utility players expect to receive in a noncooperative equilibrium. To test this, we examine agricultural productivity in West African polygynous households. We find cooperation, as evidenced by more efficient production, is greater among co-wives than among husbands and wives. Using a game-theoretic model, we show that this outcome can arise because co-wives are less altruistic toward each other than toward their husbands. We present a variety of robustness checks, which suggest results are not driven by selection into polygyny, greater propensity for cooperation among women, or household heads enforcing others’ cooperative agreements.

That is a new paper by Akresh, Chen, and Moore, via the excellent Kevin Lewis.  Here are some ungated versions.

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