R help - Apr 2016 - Robust clustered errors for probit ordinal regression analysis

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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