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<BR>第一个经济学模型:循环流成图(Circular-flow Diagram)定义:circular-flow diagram - a visual model of the economy that shows how dollars flow throughmarkets among households and firms.是资源和货币在市场中循环流动的简单图表。<BR>第二个经济学模型:生产可能性曲线(production possibilities frontier)定义:a graph that shows the combinations of output that the economy can possibly produce given the available factors of production and the available production technology.<BR>微观经济学(microeconomics):the study of how households and firms make decisions and how they interact in markets.宏观经济学(macroeconomics):the study of economy-wide phenomena, including inflation, unemployment, and economic growth.<BR>曼昆关于人与人之间的相互依赖(Interdependence)关系的精妙描述:Every day you rely on many people from around the world, most of whom you do not know, to provide you with the goods and services that you enjoy. Such interdependence is possible because people trade with one another. Those people who provide you with goods and services are not acting out of generosity or concern for your welfare. Nor is some government agency directing them to make what you want and to give it to you. Instead, people provide you and other consumers with the goods and services they produce because they get something in return.可以以这段话为例应用到不同场合来解释我们原本以为需要在形而上层面才能解释的问题。<BR>
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