There are plenty of studies on this topic either abroad or domestic. Nevertheless, most of them can be summarized into two theories: market power hypothesis and efficiency structure hypotheses.

而国内外关于市场结构、效率与银行绩效水平关系的理论和经验研究非常丰富，概括起来主要有市场力假说和效率结构假说。

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Market behaviors of generation companies are analyzed by using Walras hypothesis and an index of generation market power is given.

该文利用瓦尔拉斯假设对发电公司的市场行为进行了分析，并由此定义了一个度量发电市场势力的指标函数。

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