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st: xtabond2 question

From   Ed Levitas <>
Subject   st: xtabond2 question
Date   Thu, 6 May 2004 11:21:11 -0500


I have a question regarding the XTABOND2 command.  I'm attempting to run the
following model:

xtabond2 y l.y x1 x2 x3  , robust twostep ivstyle(l.y x1 x2 x3)

but get the following message:

repeated time values within panel

I've rechecked my data with the DUPLICATES command and found no duplicated
observations based on my TSSET criterion.

Does anyone have any suggestions regarding the error I'm committing?


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