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st: RE: RE: Standard Errors

From   "Maarten Buis" <>
To   <>
Subject   st: RE: RE: Standard Errors
Date   Tue, 28 Nov 2006 12:18:32 +0100

--- I wrote:
> An even better and easier way to get
> such a combined estimate is to constrain the effect of
> explanatory variable to be the same across years. This is
> actually very simple to do, since all you have to do is
> *not* add an interaction term with year.

A detailed description of interaction effects and lots of
Stata examples can be found on:


Maarten L. Buis
Department of Social Research Methodology 
Vrije Universiteit Amsterdam 
Boelelaan 1081 
1081 HV Amsterdam 
The Netherlands

visiting address:
Buitenveldertselaan 3 (Metropolitan), room Z434 

+31 20 5986715

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