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st: Glitch in Stata7?

From   Kalina Popova <>
Subject   st: Glitch in Stata7?
Date   Thu, 23 Sep 2004 22:39:12 -0400 (EDT)


I am trying to specify no autocorrelation in xtpcse, by typing c(i) and I
consistently get an error message that the data is not sorted.  No amount
and variety of sorting I have tried works, and I don't really think it is
the problem.  Could this be a glitch in Stata7?

Here is what I am doing exactly:

tsset panelvariable timevariable

xtpcse depvar varlist, het c(i)

I get a reading of the number of gaps in the sample and then a message
'not sorted' r(5).  What is causing this and how can I fix it?


Kalina Popova
Department of Political Science
University of Rochester
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