Economics is really a toolkit with multiple models – each a different, stylized representation of some aspect of reality. One’s skill as an economist depends on the ability to pick and choose the right model for the situation.
经济学是一个有着多种模型的工具——每一种都代表着现实生活的某个方面，经济学家的能力就体现在如何运用正确的模式来解决当前问题。