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RE: st: Requesting for help


From   Cameron McIntosh <cnm100@hotmail.com>
To   STATA LIST <statalist@hsphsun2.harvard.edu>
Subject   RE: st: Requesting for help
Date   Sun, 23 Aug 2009 16:54:27 -0400

Hi, 

I am not sure what you mean by "my result dramatically get worse." Is there multicollinearity between the time dummies and other predictors? You may want to have a look at this paper:

Phillips, J.A., & Greenberg, D.F. (2007). A comparison of methods for analyzing criminological panel data. Journal of Quantitative Criminology, 24(1), 51-72.

Cam

----------------------------------------
> Date: Sun, 23 Aug 2009 04:31:56 -0700
> From: zinu200607@yahoo.com
> To: statalist@hsphsun2.harvard.edu
> Subject: st: Requesting for help
>
> Dear officer
>
> I was wondering your help for my situation
>
> I am running a fixed effect regerssion for sample of 27 countries which are Sub sahara African countries for the 15 years 1993-2007. I am following one paper to model my specification .the paper has included time dummies in all the specification. however when i included time dummies my result dramatically get worse and moreover all time dummies are insginificant. so can you suggest me any solution ,help??
> PS: my regression looks like
> xtreg lnGDP lnTrade Year dummies,fe i(countryid)
>
>
>
>
> *
> * 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/

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