Cooperation in Polygynous Households
通过公共品博弈实验，比较一夫多妻和一夫一妻家庭中夫妻合作的意愿，发现一夫多妻家庭中夫妻合作更少，共妻之间合作最少，且行为更具互惠性而非利他性。
Using a carefully designed series of public goods games, we compare, across monogamous and polygynous households, the willingness of husbands and wives to cooperate to maximize household gains. Compared to monogamous husbands and wives, polygynous husbands and wives are less cooperative, one with another, and co-wives are least cooperative, one with another. The husbands’ and wives’ behavior in a corresponding series of inter-household games indicates that these differences cannot be attributed to selection of less cooperative people into polygyny. Finally, behavior in polygynous households is more reciprocal and less apparently altruistic.