PMSE dominance of the positive-part shrinkage estimator in a regression model with proxy variables
PMSE dominance of the positive-part shrinkage estimator in a regression model with proxy variables
复制标题
具有代理变量的回归模型中正部分收缩估计量的 PMSE 优势
DOI:
10.1080/00949655.2018.1491576
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发表时间:
2018
影响因子:
1.2
通讯作者:
Akio Namba & Haifeng Xu
中科院分区:
文献类型:
--
作者:
Norkute Milda;Sarafidis Vasilis;Yamagata Takashi;Cui Guowei;Akio Namba & Haifeng Xu
Consider a linear regression model with some relevant regressors are unobservable. In such a situation, we estimate the model by using the proxy variables as regressors or by simply omitting the relevant regressors. In this paper, we derive the explicit formula of predictive mean squared error (PMSE) of a general family of shrinkage estimators of regression coefficients. It is shown analytically that the positive-part shrinkage estimator dominates the ordinary shrinkage estimator even when proxy variables are used in place of the unobserved variables. Also, as an example, our result is applied to the doublek-class estimator proposed by Ullah and Ullah (Doublek-class estimators of coefficients in linear regression. Econometrica. 1978;46:705–722). Our numerical results show that the positive-part doublek-class estimator with proxy variables has preferable PMSE performance.
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影响因子:
0.8
作者:
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通讯作者:
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影响因子:
6.1
作者:
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通讯作者:
M. Wickens
DOI:
10.1080/00949659808811902
发表时间:
1998
期刊:
影响因子:
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DOI:
10.1198/016214506000000735
发表时间:
2006-12-01
影响因子:
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