Clustered Standard Errors with data containing NAs

Question

I\'m unable to cluster standard errors using R and guidance based on this post. The cl function returns the error:

Error in tapply(x, cluster1, sum) : arguments          


        

Answer 1

For one-way clustering, the robcov command, from the {rms} package works really well. read this for more information http://www.inside-r.org/packages/cran/rms/docs/robcov