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Variable Selection Using Bayesian Additive Regression Trees
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DOI：10.1214/23-STS900.png)
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Variable selection is an important statistical problem. This problem becomes more challenging when the candidate predictors are of mixed type (e.g., continuous and binary) and impact the response variable in nonlinear and/or nonadditive ways. In this paper, we review existing variable selection approaches for the Bayesian additive regression trees (BART) model, a nonparametric regression model, which is flexible enough to capture the interactions between predictors and nonlinear relationships with the response. An emphasis of this review is on the ability to identify relevant predictors. We also propose two variable importance measures, which can be used in a permutation -based variable selection approach, and a backward variable selection procedure for BART. We introduce these variations as a way of illustrating limitations and opportunities for improving current approaches and assess these via simulations.
Keyword:
BART
feature selection
nonparametric regres- sion
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3.4
论文数:
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被引数:
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