通过动物繁殖和生存的经济学均衡分析后认为，繁殖和生存的边际产品转换率MRT♀♂在不同动物种群和同一种群不同动物个体的变化，可形成一妻多夫、一夫多妻和一夫一妻3种形式的对偶婚姻。人类不同形式的对偶婚姻不仅仅是一种生物学上的适应（本能），而且也是一种文化上的适应（智能），也和动物婚姻一样符合经济规律。%Based on the economic equilibrium theory of animal survival and breeding, there are three forms of dual matrimony, that is, polyandry, polygamy and monogamy ,which changed as marginal rates of transformation between survival and breeding in different animal population and its different individual. The different forms of human dual matrimony are not only a biological adaptation (instinct),but also a civilization adaptation(intelligence).The human Matrimony, however, follows the economic laws as animal matrimony does.
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