Sparse Multivariate Regression With Covariance Estimation.
Sparse Multivariate Regression With Covariance Estimation.
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DOI:
10.1198/jcgs.2010.09188
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发表时间:
2010
期刊:
影响因子:
--
通讯作者:
Zhu J
中科院分区:
文献类型:
--
作者:
Rothman AJ;Levina E;Zhu J
We propose a procedure for constructing a sparse estimator of a multivariate regression coefficient matrix that accounts for correlation of the response variables. This method, which we call multivariate regression with covariance estimation (MRCE), involves penalized likelihood with simultaneous estimation of the regression coefficients and the covariance structure. An efficient optimization algorithm and a fast approximation are developed for computing MRCE. Using simulation studies, we show that the proposed method outperforms relevant competitors when the responses are highly correlated. We also apply the new method to a finance example on predicting asset returns. An R-package containing this dataset and code for computing MRCE and its approximation are available online.
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