什么是经济学? 稀缺与选择( Scarcity and choice) ⅱ)经济学研究稀缺资源的配置问题( Economics is the study of the allocation of scarce resources ii) Scarcity means that to have more of some things there must be less of others(Opportunity Cost): Production Possibilities frontier 西南民族大学西南民族大学 什么是经济学？ 稀缺与选择（Scarcity and Choice ） i)经济学研究稀缺资源的配置问题（ Economics is the study of the allocation of scarce resources） ii) Scarcity means that to have more of some things there must be less of others (Opportunity Cost): Production Possibilities Frontier