Dear all,
I’ll need your help with obtaining robust clustered errors. I use polr command
in MASS package m<–porl(y~x1+x2,data=mydata, method=probit). In the rms
package, this is as simple as: clusterSE<–robcov(m, mydata$id). Is it possible
to do something similar for polr object as well? Thank you very much
Best,
Faradj
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