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  "Description": "Expectile regression is a nice tool for estimating the\nconditional expectiles of a response variable given a set of\ncovariates. This package implements a regression tree based\ngradient boosting estimator for nonparametric multiple\nexpectile regression, proposed by Yang, Y., Qian, W. and Zou,\nH. (2018) <doi:10.1080/00949655.2013.876024>. The code is based\non the 'gbm' package originally developed by Greg Ridgeway.",
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