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st: RE: xtabond2--number of instruments.
From
DE SOUZA Eric <[email protected]>
To
"[email protected]" <[email protected]>
Subject
st: RE: xtabond2--number of instruments.
Date
Tue, 28 Jun 2011 09:29:33 +0200
Have a look at slide 21 in this document: http://www.nuff.ox.ac.uk/users/bond/dynamic1.pdf
and see how the instruments are defined. (The slides are not numbered.)
The whole course is worth working through.
Eric
Eric de Souza
College of Europe
Brugge (Bruges), Belgium
http://www.coleurope.eu
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Steven Archambault
Sent: 28 June 2011 00:15
To: [email protected]
Subject: st: xtabond2--number of instruments.
Hi all,
I am trying to figure out xtabond2. I don't see why this command gives me 42 instruments
xtabond2 lnyp l(1/2).lnyp yr1988-yr2009, gmm(l(1).lnyp, laglimits(1 2)) robust noleveleq
This equation gives me 56 instruments
xtabond2 lnyp l(1/2).lnyp yr1988-yr2009, gmm(l(1).lnyp, laglimits(1 3)) robust noleveleq
Is it counting instruments for each year? I don't quite get it.
By the way, there are 1752 observations, 122 panels.
I'd appreciate the info. Also, I am reading "How to do xtabond2". Its very informative, but I am still unclear.
Thanks!
-Steve
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