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Re: st: xtprobit clustered standard errors or gllamm

From   Gordon Hughes <>
Subject   Re: st: xtprobit clustered standard errors or gllamm
Date   Thu, 23 Aug 2012 14:51:32 +0100

-xtprobit- does not offer the vce(robust) or vce(cluster) options. This is unusual for a Stata xt... procedure and you might take that up with Stata Corp. However, for practical purposes the vce(bootstrap) option should be a perfectly satisfactory alternative provided that you declare an appropriate cluster() variable in the vce specification. Use a much larger number of replications than the default - Cameron & Trivedi recommend at least 400. For further details, see Colin Cameron & Pravin Trivedi (2010), Microeconometrics Using Stata, College Station: Stata Press.

Gordon Hughes


Dear all,

I use Stata 11 SE and I am looking for a way to estimate a xtprobit model
with clustered standard errors.

I have data from 180 subjects who are divided into 60 independent groups but
the subjects within one group interact with each other. The dataset contains
five periods but each subject occurs only two or three times within the five
My dependent variable is binary and a referee has asked for a random effects
probit model with clustered standard errors on group level to control for
individual subject effects, time and  the potential correlation of errors
within a group.

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