人的行为因有不同的目的与任务而分为不同的类型和具有不同的性质。人的市场行为区别于其它的社会交往活动就在于:市场行为的主体是经济人。斯密的“经济人”假说虽屡遭非议,但诚如约翰·穆勒所言,经济人作为科学研究的抽象虽然未必是真实的人,但却是最 Human behavior is divided into different types and of different nature for different purposes and tasks. People’s market behavior is different from other social activities is that: the main body of market behavior is economic. Although Smith’s “economic man” hypothesis has repeatedly been criticized, as John Muller put it, although the abstraction of economic man as a scientific research may not necessarily be true, it is the most