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st: Can't run -xtgee, corr(fixed)- (Was -areg- versus -xtreg, fe- (revised))


From   "Clive Nicholas" <Clive.Nicholas@newcastle.ac.uk>
To   statalist@hsphsun2.harvard.edu
Subject   st: Can't run -xtgee, corr(fixed)- (Was -areg- versus -xtreg, fe- (revised))
Date   Thu, 3 Jun 2004 04:02:30 +0100 (BST)

All,

Although I've discovered that -xtgee- models may be a solution to my
problems (posted earlier), my panel is unbalanced and I have gaps in the
time series, which means that specifying an AR-1 structure is invalid, for
various reasons. Thus, I have tried to specify a -fixed- correlation
structure. I used Shannon Driver's -corrmat- package (downloadable from
-ssc-, I believe), saved the correlation matrix as -lib-, and then:

. xtgee edldmch edround2 edround3 edtime edtimesq edyear edpollch lagconch
laglabch lagldmch clmargin ldmargin conplace labplace ldmplace edenp class
wales prvnorth midlands swest if edmarker==1, corr(fixed lib) robust
correlation matrix must be 1676x1676
r(198);

...and then...

. set matsize 11000
op. sys. refuses to provide memory
r(909);

. set matsize 10000
op. sys. refuses to provide memory
r(909);

Difficult one. I use Stata 8.2 (up-to-date on Windows 2000).

CLIVE NICHOLAS        |t: 0(044)191 222 5969
Politics              |e: clive.nicholas@ncl.ac.uk
Newcastle University  |http://www.ncl.ac.uk/geps
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