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Re: st: One v. two-step ECMs


From   Muhammad Anees <anees@aneconomist.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: One v. two-step ECMs
Date   Thu, 2 Feb 2012 16:08:04 +0500

The -regress- is for cross section, while -xtreg-, furthermore check
-help xt- for more panel data utilities of Stata.

On Thu, Feb 2, 2012 at 3:18 PM, Neesha Harnam <neesha.harnam@gmail.com> wrote:
> Dear statalist users,
>
> I have an error-correction model for analyzing panel data (n=70, t=30) and am having difficulty figuring out if and where I went wrong with my coding. The results for the one- and two-step ECMs are very different (especially in terms of coefficients and significance) depending on the model used, and my understanding was that they estimated the same thing. The differences also appear in the indicator variables once I add them to my model. GDP per capita is I(1) but stationary in differences, while H1, a health outcome, is I(0). IND1-4 are dummy variables that show whether a country experienced a particular event in a given year.
>
> Two-step process:
> regress H1 log_gdppc, vce(cluster countrycode)
> predict e, resid
> regress DH1 Dlog_gdppc L.e, vce(cluster countrycode)
>
> Two-step with indicators:
> regress DH1 Dlog_gdppc L.e IND1 IND2 IND3 IND4, vce(cluster countrycode)
>
> One-step process:
> regress DH1 Dlog_gdppc L.H1 L.log_gdppc, vce(cluster countrycode)
>
> One-step with indicators:
> regress DH1 Dlog_gdppc L.H1 L.log_gdppc IND1 IND2 IND3 IND4, vce(cluster countrycode)
>
> Any help would be greatly appreciated.
>
> Thank you,
> Neesha
>
>
> *
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-- 

Best
---------------------------
Muhammad Anees
Assistant Professor/Programme Coordinator
COMSATS Institute of Information Technology
Attock 43600, Pakistan
http://www.aneconomist.com

*
*   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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