动物婚姻起源的经济分析

Economic Analyses on the Origin of the Animal Marriage

用动物生存和繁育形成的生存扩展曲线对动物婚姻形式进行分析后指出 ,当个体的生存相对于繁育而言是奢侈品时 ,动物婚姻形成内婚制度 ;当繁育相对于生存成为奢侈品时 ,则形成外婚制度 ;而当生存与繁育的边际替代率大于 1时 ,动物形成对偶婚姻。因此 ,在一定生存能力的预算约束下 ,动物在生存和繁育支出时决策的效用最大化 ,成为动物婚姻不同形式的经济选择。

Based on the analysis of the survival expanding curve formed from the individual survival and breeding, the animal marriage could be divided into three kinds of forms, i.e. consanguinity, communal and dual marriage. Under the budget of the survival ability, reducing survival and breeding cost will be the economic selection for varied forms of animal marriage.