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• W2772373653 abstract "We propose an approach for building ensembles of regularized linear models by optimizing a novel objective function, that encourages sparsity within each model and diversity among them. Our procedure works on top of a given penalized linear regression estimator (e.g., Lasso, Elastic Net, SCAD) by fitting it to possibly overlapping subsets of features, while at the same time encouraging diversity among the subsets, to reduce the correlation between the predictions that result from each fitted model. The predictions from the models are then aggregated. For the case of an Elastic Net penalty and orthogonal predictors, we give a closed form solution for the regression coefficients in each of the ensembled models. An extensive simulation study and real-data applications show that the proposed method systematically improves the prediction accuracy of the base linear estimators being ensembled. Extensions to GLMs and other models are discussed." @default.
• W2772373653 created "2017-12-22" @default.
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• W2772373653 date "2017-12-10" @default.
• W2772373653 modified "2023-09-27" @default.
• W2772373653 title "Ensembles of Regularized Linear Models" @default.
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• W2772373653 hasPublicationYear "2017" @default.
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