| 单词 | model |
| 释义 | model A simplified system used to simulate some aspects of the real economy. Economics is bound to use simplified models: the real world economy is so large and complicated that it cannot be fully described in finite time or space. A good model concentrates on the point it is studying and leaves out anything not essential to this. Models vary between the very simple, for example the IS-LM model, and large econometric models with thousands of equations. The results of any change in the assumptions of an economic model can be worked out, either by theory or numerical calculation; whether the results generalize to the real world can only be found out by experience. If model-builders have picked the right aspects of reality to include in their models, there will be some approximate resemblance between the model's predictions and the real economy. |
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