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st: xtabond changes in Stata 9


From   Allin Cottrell <cottrell@wfu.edu>
To   statalist@hsphsun2.harvard.edu
Subject   st: xtabond changes in Stata 9
Date   Mon, 13 Nov 2006 10:17:41 -0500 (EST)

On the page http://www.stata.com/help.cgi?whatsnew
item #48 says: "xtabond produced consistent but inefficient estimates when there were gaps in the time series. This has been fixed."

Can anyone tell me anything about the details of this? That is, how exactly v9 is extracting more efficient estimates? Thanks.

--
Allin Cottrell
Department of Economics
Wake Forest University, NC
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