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From | Narasimhan Sowmyanarayanan <narasimhan.sowmyanarayanan@gmail.com> |
To | statalist@hsphsun2.harvard.edu |
Subject | Re: st: RE: Question on the xtdpd command |
Date | Sun, 5 Sep 2010 00:22:55 -0400 |
Hi Martin: THank you for the reply. I think I got the xtdpd to work. Your reply was helpful in figuring out the issue. Sincerely On Sat, Sep 4, 2010 at 4:22 PM, Martin Weiss <martin.weiss1@gmx.de> wrote: > > <> > > You can also try this using the official examples: > > > *********** > webuse abdata, clear > > //no gaps > xtdes > xtdpd l(0/2).n l(0/1).(w ys) k, dgmmiv(n) div(l(0/1).(w ys) k) fod > > //create gaps > set seed 10010 > drop if runiform()<.02 > xtdes > //-xtdpd- starts complaining > xtdpd l(0/2).n l(0/1).(w ys) k, dgmmiv(n) div(l(0/1).(w ys) k) fod > *********** > > > HTH > Martin > > -----Original Message----- > From: owner-statalist@hsphsun2.harvard.edu > [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Narasimhan > Sowmyanarayanan > Sent: Samstag, 4. September 2010 22:07 > To: statalist@hsphsun2.harvard.edu > Subject: st: Question on the xtdpd command > > I have a query on the xtdpd command and the specific use of the fod > option to use forward orthogonal deviations as the instrument. In the > specific dataset I am trying to use the fod option, I get the message > "fodeviation is not allowed when there are gaps in the data." While I > have an unbalanced panel, I did not find any gaps in the data in the > panel. Further, when I do xtset, it does not give me any message that > there are gaps in the panel. My limited experience with this is that > one can estimate the fod option with unbalanced panels ? Atleast this > is what I read in the Roodman (2009) paper in stata journal on How to > do xtabond2. I would appreciate any insights someone can provide on > this. I am not estimating a levels model. Also, I tried using the fod > option using a mock dataset "mus08psidextract.dta" from Cameron and > Trivedi's most recent textbook with the fod option. That works fine. > the data is a balanced panel though. > > Thanks for your time and attention in advance. > > Sincerely, > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/statalist/faq > * http://www.ats.ucla.edu/stat/stata/ > > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/statalist/faq > * http://www.ats.ucla.edu/stat/stata/ > * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/