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st: nbreg & vce(opg) don't work together
From
Richard Williams <[email protected]>
To
[email protected]
Subject
st: nbreg & vce(opg) don't work together
Date
Sat, 10 Mar 2012 00:45:44 -0500
I am trying to replicate some analyses originally done in Stata 9. In
Stata 12 I can't get the vce(opg) option to work with nbreg, e.g.
use http://www.stata-press.com/data/r12/rod93, clear
nbreg deaths i.cohort, nolog
nbreg deaths i.cohort, nolog vce(opg)
version 9: xi: nbreg deaths i.cohort, nolog vce(opg)
The -vce(opg)- is ignored in all cases, i.e. I just get the regular
standard errors. If I actually fire up my old copy of Stata 9,
though, the -vce(opg)- option works. Is this a bug that crept into
Stata somewhere along the way, or am I doing something wrong?
-------------------------------------------
Richard Williams, Notre Dame Dept of Sociology
OFFICE: (574)631-6668, (574)631-6463
HOME: (574)289-5227
EMAIL: [email protected]
WWW: http://www.nd.edu/~rwilliam
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