Error Covariance Matrix Estimation In High Dimensional Approximate Factor Models Using Adaptive Thresholding
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Error Covariance Matrix Estimation in High Dimensional Approximate Factor Models Using Adaptive Thresholding
Author | : Paul J. Chimenti |
Publisher | : |
Total Pages | : |
Release | : 2013 |
Genre | : |
ISBN | : |
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Abstract: Approximate factor models are popular in nance and economics. A key to eectively utilizing such a model is to accurately estimate the error covariance matrix. Errors related to certain predictors are expected to be correlated and this must be modeled eectively. Adaptive thresholding is a method for estimating the error covariance matrix of such a model. This method is described in detail and a simulation study sheds light on the behavior of this method under dierent sample sizes and parameterizations.
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