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st: "insufficient observations" with xtreg

From   "Liu, Ying" <ying.liu@Vanderbilt.Edu>
Subject   st: "insufficient observations" with xtreg
Date   Wed, 19 Jul 2006 20:20:07 -0500 (CDT)

Dear all,

I have some problems with my panel dataset. I first ran:

. tsset var67 year
       panel variable:  var67, 1 to 2662
        time variable:  year, 1994 to 2004

Then I used xtreg, but got the error message about insufficient
observation (2001).

I'd really appreciate it if someone can help me with it.


Liu, Ying
Vanderbilt University
Email: ying.liu@Vanderbilt.Edu

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