他的成果大多集中在经济主体在模型限制下学习和不完全理性预期这些方面。
Much of his work has focused on agents learning within models and less-than-fully-rational expectations.
然而，如果预期不是完全理性的，只不过是接近于理性，那么很小的冲击也会导致潜在的很大波动。
However, if the anticipation is not complete rational but only approaches to the rationality, then the very small impact also can cause the latent big undulation.
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