这是经济类必考的课程。始终围绕着价格确定来研究，厂商借助价格追求利润最大化，消费者借助价格追求效益（满意度）最大化。

谢谢了 明白了

You should bear in mind also~
In the context of microeconomics, there is no money ...
the all "price" is micro context should be in "relative terms"

Macroeconmics = human behavior in aggregate context, consider the effect of money as well
so some people regard macroeconomics as monetary economics