Nonparametric methods for doubly robust estimation of continuous treatment effects.
Nonparametric methods for doubly robust estimation of continuous treatment effects.
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DOI:
10.1111/rssb.12212
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发表时间:
2017-09
期刊:
影响因子:
--
通讯作者:
Small DS
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文献类型:
--
作者:
Kennedy EH;Ma Z;McHugh MD;Small DS
Continuous treatments (e.g., doses) arise often in practice, but many available causal effect estimators are limited by either requiring parametric models for the effect curve, or by not allowing doubly robust covariate adjustment. We develop a novel kernel smoothing approach that requires only mild smoothness assumptions on the effect curve, and still allows for misspecification of either the treatment density or outcome regression. We derive asymptotic properties and give a procedure for data-driven bandwidth selection. The methods are illustrated via simulation and in a study of the effect of nurse staffing on hospital readmissions penalties.
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