Local Linear Forests
Local Linear Forests
复制标题
局部线性森林
DOI:
10.1080/10618600.2020.1831930
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发表时间:
2021
影响因子:
2.4
通讯作者:
Wager, Stefan
中科院分区:
文献类型:
--
作者:
Friedberg, Rina;Tibshirani, Julie;Athey, Susan;Wager, Stefan
Random forests are a powerful method for nonparametric regression, but are limited in their ability to fit smooth signals. Taking the perspective of random forests as an adaptive kernel method, we pair the forest kernel with a local linear regression adjustment to better capture smoothness. The resulting procedure,local linear forests, enables us to improve on asymptotic rates of convergence for random forests with smooth signals, and provides substantial gains in accuracy on both real and simulated data. We prove a central limit theorem valid under regularity conditions on the forest and smoothness constraints, and propose a computationally efficient construction for confidence intervals. Moving to a causal inference application, we discuss the merits of local regression adjustments for heterogeneous treatment effect estimation, and give an example on a dataset exploring the effect word choice has on attitudes to the social safety net. Last, we include simulation results on real and generated data. A software implementation is available in the R package grf. Supplementary materials for this article are available online.
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DOI:
--
发表时间:
2003
期刊:
Social Science Research Network
影响因子:
--
作者:
J. Heckman;L. Lochner;Petra E. Todd
通讯作者:
Petra E. Todd
DOI:
--
发表时间:
2021
期刊:
The Encyclopedia of Research Methods in Criminology and Criminal Justice
影响因子:
--
作者:
Tom W. Smith
通讯作者:
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DOI:
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发表时间:
2016
期刊:
影响因子:
--
作者:
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通讯作者:
D. Nordman
DOI:
10.1073/pnas.1510489113
发表时间:
2016-07-05
影响因子:
11.1
作者:
Athey, Susan;Imbens, Guido
通讯作者:
Imbens, Guido
DOI:
10.1093/biostatistics/kxi024
发表时间:
2005
期刊:
Biostatistics (Oxford, England)
影响因子:
--
作者:
Su,Xiaogang;Tsai,Chih-Ling
通讯作者:
Tsai,Chih-Ling