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B-CAPM模型的GMM估计和检验

, PP. 20-25

Keywords: CAPM模型,B-CAPM模型,GMM方法,估计和检验

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Abstract:

?作为资本资产定价模型(CAPM)的发展之一,B-CAPM模型更适合于复杂多变的现实资本市场。本文首先分析从CAPM到B-CAPM的模型转化及其理论含义,然后迭代求出B-CAPM模型的零贝塔期望收益的极大似然估计值(MLE),最后通过案例,实证运用GMM方法构建B-CAPM的估计和检验。结果表明,B-CAPM模型适用于证券市场收益和风险的度量以及有效性检验,GMM方法更符合实际。

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