曼昆的《经济学原理》作为经济学入门的经典教材，其核心内容之一就是通过模型来解释和预测经济现象。以下是曼昆经济学中常用的九大模型及其图解，帮助读者快速入门。
1. 循环流量图
图解：
循环流量图展示了货币如何通过市场在家庭与企业之间流动。
家庭支出 --(市场)--> 企业收入 --(市场)--> 家庭收入
解释：
这个模型说明了货币在经济体系中的循环过程，家庭通过消费支持企业，企业通过支付工资支持家庭。
2. 生产可能性边界（PPF）
图解：
生产可能性边界是一个表示在既定资源和技术水平下，一个经济体能够生产的不同商品组合的图。
”`
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