Rational expectation considers the CobWeb model has unique equilibrium that determined by parameters of model.

理性预期认为蛛网模型具有唯一的均衡，这一均衡值由模型的参数决定。

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Usually, the stability of individual commodity market price fluctuation is studied based on supply-demand equilibrium, called as "Cobweb Model".

通常，关于单商品市场价格波动的稳定性问题，是在供需均衡的条件下进行研究的，称为“蛛网模型”。

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With the use of the shrinked-map principle, we obtain a more general condition of the stability in cobweb model, where the usually cited linear hypothesis is canceled.

针对更一般的情形，利用压缩映象原理，给出了蛛网模型的稳定性条件，取消了通常的线性假设，同时提供了“蛛网”的一种简洁的几何描述。

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