[R] propensity score adjustment using R
Frank E Harrell Jr
f.harrell at vanderbilt.edu
Thu Sep 18 20:27:41 CEST 2008
> Frank E Harrell Jr wrote:
>> That is a high variance procedure as compared with covariate adjustment
>> using the propensity score, or stratification.
>> Frank Harrell
> Ah, wait what if I got very high dimensional X ? Even with 20 binary
> covariates i would end up with more than 1 million possibilities...
That's why you do the propensity score-- to adjust or stratify on only
Frank E Harrell Jr Professor and Chair School of Medicine
Department of Biostatistics Vanderbilt University
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