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RE: st: Panel Regression with missing x for one entity


From   "Whelan, Paul" <Paul.Whelan@bankofengland.co.uk>
To   "'statalist@hsphsun2.harvard.edu'" <statalist@hsphsun2.harvard.edu>
Subject   RE: st: Panel Regression with missing x for one entity
Date   Wed, 15 Aug 2012 10:55:32 +0100

Sure - I guess that is obvious. 

Thanks, 
Paul

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Maarten Buis
Sent: Tuesday, August 14, 2012 7:23 PM
To: statalist@hsphsun2.harvard.edu
Subject: Re: st: Panel Regression with missing x for one entity

*************************
This email has reached the Bank via the Internet or an external network
*************************
On Tue, Aug 14, 2012 at 7:43 PM, Whelan, Paul wrote:
>> I'm running a panel regression with a cross-section of countries:
>
> y_it = c_it + beta_1 x_1 + ... + beta_n x_n + eps_it
>
> For one of my countries , a particular x is completely missing.
> The estimation works fine but I cannot produce predictions for this particular entity.

You (through Stata) create the prediction by just filling in the
equation you gave above. A missing value just mean you don't know the
value. What would be the outcome of: beta_1*"an unknown value"? Stata
correctly answers: "an unknown value".

Hope this helps,
Maarten

---------------------------------
Maarten L. Buis
WZB
Reichpietschufer 50
10785 Berlin
Germany

http://www.maartenbuis.nl
---------------------------------
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