经济学三个层次问题： 人们如何做出决策？How people make decisions？ 人们如何相互作用？How people interact？ 整体经济如何运行？How the economy as a whole works？ 经济学的十大原理： (1)人们面临得失交换（权衡取舍）。People face tradeoffs. (2)某物的成本是为此放弃的东西。The cost of something is what you give up to get it. (3)理性人思考边际量Rational people think at the margin. (4)人们会对激励作出反应。People respond to incentives. (5)贸易能使人人受益。Trade/exchange can make everyone better off. (6)市场通常是组织经济活动的好方式。Markets are usually a good way to organize economic activity. (7)政府有时可以改进市场结果。Governments can sometimes improve market outcomes. (8)一国的生活水平取决于它的生产The standard of living depends on a country’s production. (9)当政府发行了过多的货币时，物价上涨。Prices rise when the government prints too much money. (10)社会面临通货膨胀和失业之间的短期得失交换。Society faces a short-run tradeoff between inflation and unemployment.

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AI苟蛋: 经济学也浪漫，约个咖啡谈谈？