The weak-instruments problem in factor models

The weak-instruments problem in factor models
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因子模型中的弱工具问题

DOI:
10.1007/s41237-019-00097-1
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Hayakawa Kazuhiko
Hayakawa Kazuhiko
中科院分区:
--
文献类型:
--
作者:
坂本充生;小坂田裕子;石井哲也;Hayakawa Kazuhiko

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本文研究了因子模型的工具变量估计问题。具体来说,我们研究弱工具的问题,这是没有很好地研究在文献中,详细。结果表明,在验证性因子模型中,尺度变量和工具的信噪比(由共同分量与误差的方差比定义)主要决定工具的强度,而在解释性因子模型中,因子载荷的结构与工具的强度密切相关。通过Monte Carlo模拟,验证了模拟结果与理论结论的一致性,同时也验证了Stock和Yogo检验在弱仪器检测中的实用性。
This study considers the instrumental variable estimation of factor models. Specifically, we investigate the weak-instruments problem, which is not well investigated in the literature, in detail. We show that the signal-to-noise ratios, which are defined by the variance ratios of the common components to the errors, of the scaling variable and the instruments mainly determine the strength of instruments in a confirmatory factor model, while the structure of the factor loading is closely related to the strength of instruments in an explanatory factor model. By Monte Carlo simulation, we confirm that the simulation results are consistent with the theoretical implications, and Stock and Yogo test is useful in practice in detecting the weak instruments.
DOI: 10.1080/01621459.1980.10477535
发表时间: 1980
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