推荐回答（1个）
【原文】Ten Principles of Economics 3: Rational People Think at the Margin
【译文】十大经济学原理3：边际分析是理性人的思考方式
【原文】Economists normally assume that people are rational. Rational people systematically and purposefully do the best they can to achieve their objectives, given the available opportunities. As you study economics, you will encounter firms that decide how many workers to hire and how much of their product to manufacture and sell to maximize profits. You will also encounter individuals who decide how much time to spend working and what goods and services to buy with the resulting income to achieve the highest possible level of satisfaction.
【Rational people】理性人。我们这里所说的理性人，又称“合乎理性的人”，“经济人”，是指每一个从事经济活动的人都是利己的。也可以说，每一个从事经济活动的人所采取的经济行为都是力图以自己的最小经济代价去获得自己最大的经济利益。
“经济人”和“经纪人”要严格区分。“经纪人”主要指房地产中介，保险中介，明星经纪人等。
理性人会对激励做出反应，公交车司机在固定工资和工资与乘客数量挂钩下的工作态度是不同的。
亚当·斯密认为，自私可以给社会整体带来很大的利益。他这样描述：每个人都会尽其所能，运用自己的资本来争取最大的利益。一般而言，他不会意图为公共服务，也不自知对社会有什么贡献。他关心的只是自己的安全、自己的利益。但如此一来，他就好像被一只无形之手引领，在不自觉中对社会的改进尽力而为。在一般的情形下，一个人为求私利而无心对社会做出贡献，其对社会的贡献远比有意图作出的大。
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