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  "Description": "Implements an extension of Bayesian Additive Regression\nTrees (BART) in which each regression tree outputs a linear\ncombination of random ridge functions (i.e., a composition of a\nnon-linear function like cosine, hyperbolic tangent, the\nrectified linear unit with an affine transformation) instead of\na constant. Can be used to perform \"targeted smoothing\" in\nwhich trees split on certain covariates but output smooth\nfunctions in other covariates. For more information, see Yee,\nGhosh, and Deshpande (2026+) <doi:10.48550/arXiv.2411.07984>.",
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