Identifying Causal Effects With Proxy Variables of an Unmeasured Confounder.
Identifying Causal Effects With Proxy Variables of an Unmeasured Confounder.
复制标题
用未衡量的混杂因素的代理变量识别因果效应。
DOI:
10.1093/biomet/asy038
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发表时间:
2018-12
期刊:
影响因子:
2.7
通讯作者:
Tchetgen Tchetgen E
中科院分区:
文献类型:
--
作者:
Miao W;Geng Z;Tchetgen Tchetgen E
We consider a causal effect that is confounded by an unobserved variable, but with observed proxy variables of the confounder. We show that, with at least two independent proxy variables satisfying a certain rank condition, the causal effect is nonparametrically identified, even if the measurement error mechanism, i.e., the conditional distribution of the proxies given the confounder, may not be identified. Our result generalizes the identification strategy of that rests on identification of the measurement error mechanism. When only one proxy for the confounder is available, or the required rank condition is not met, we develop a strategy to test the null hypothesis of no causal effect.
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DOI:
10.1097/ede.0b013e3181d61eeb
发表时间:
2010-05
期刊:
Epidemiology (Cambridge, Mass.)
影响因子:
--
作者:
Lipsitch M;Tchetgen Tchetgen E;Cohen T
通讯作者:
Cohen T
影响因子:
2.7
作者:
Ogburn EL;Vanderweele TJ
通讯作者:
Vanderweele TJ
影响因子:
6.1
作者:
Chen, Xiaohong;Chernozhukov, Victor;Newey, Whitney K.
通讯作者:
Newey, Whitney K.
影响因子:
2.1
作者:
Gagnon-Bartsch, Johann A.;Speed, Terence P.
通讯作者:
Speed, Terence P.
影响因子:
2.7
作者:
GOODMAN, LA
通讯作者:
GOODMAN, LA