From the perspective of hedging and structural shift, correlation between the volatility rate and rate of return is not unitary, compared in theory and in practice.

从套期保值和结构转移的角度来看，理论上和现实中的收益率和波动率之间的相关关系也不统一。

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For a long period time, Keynesian theory of insufficient effective demand occupied the mainstream position, while Hayek's theory of structural imbalance is not so prevailing.

很长一段时间，凯恩斯的有效需求不足论占据主流地位，哈耶克的结构失衡论则屈居冷宫。

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But we think that this theory of double-role is only a general static and structural analysis and not a situational study in terms of processes.

本文认为，这种“双重角色”理论还只是一种静态和结构主义的普适性分析，而非过程化的情景性研究。

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