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st: Re: testing across different sub-samples


From   Kit Baum <baum@bc.edu>
To   statalist@hsphsun2.harvard.edu
Subject   st: Re: testing across different sub-samples
Date   Fri, 25 Sep 2009 06:55:16 -0400

<>

That would make the problem much simpler, but it would also impose the constraints that the optimal coefficients on each component of the sum are equal, which is a much stronger statement than that to be tested in the user's setup. The suest approach seems sensible.

Kit

On Sep 25, 2009, at 2:33 AM, Nick wrote:

This kind of thing is not my territory at all, but I wondering if
fitting  models in which x1+x2+x3 were summed to be a single predictor
would make this easier.


Kit Baum   |   Boston College Economics & DIW Berlin   |   http://ideas.repec.org/e/pba1.html
An Introduction to Stata Programming | http://www.stata-press.com/books/isp.html
   An Introduction to Modern Econometrics Using Stata  |   http://www.stata-press.com/books/imeus.html

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