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arXiv 2006.04709stat.MLcs.LGstat.ME
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Wasserstein随机森林及其在异质处理效应中的应用

Wasserstein Random Forests and Applications in Heterogeneous Treatment Effects

Sorbonne Université(索邦大学);CNRS(法国国家科学研究中心);Université de Paris(巴黎大学);INSERM(法国国家健康与医学研究院);INRA(法国国家农业研究院)

Qiming Du, Gérard Biau, François Petit, Raphaël Porcher

摘要:

我们提出了新的见解,因果推断的背景下,异质处理效应,提出自然变异的随机森林估计的关键条件分布。为了实现这一点,我们重铸Breiman的原始分裂标准的经验措施之间的瓦瑟斯坦距离。这种重新表述表明,随机森林很好地适应于估计条件分布,并提供了一个自然的算法扩展到多变量输出。按照Breiman的建设的哲学,我们提出了一些变种的分裂规则,非常适合于条件分布估计问题。一些初步的理论联系建立了各种数值实验,这表明我们的方法可能有助于在复杂的情况下进行更透明的因果推断。

英文摘要:

We present new insights into causal inference in the context of Heterogeneous Treatment Effects by proposing natural variants of Random Forests to estimate the key conditional distributions. To achieve this, we recast Breiman's original splitting criterion in terms of Wasserstein distances between empirical measures. This reformulation indicates that Random Forests are well adapted to estimate conditional distributions and provides a natural extension of the algorithm to multivariate outputs. Following the philosophy of Breiman's construction, we propose some variants of the splitting rule that are well-suited to the conditional distribution estimation problem. Some preliminary theoretical connections are established along with various numerical experiments, which show how our approach may help to conduct more transparent causal inference in complex situations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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