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st: constant variable as IV in panel?

From   Matthias Opfinger <>
Subject   st: constant variable as IV in panel?
Date   Thu, 23 Jun 2011 11:22:19 +0200

Hi everyone,

I want to estimate a panel model with observations on approx. 90 countries for five points in time between 1980 and 2005. However, one of my explanatory variables is endogeneous. The only possible instrument is a variable on climatic zones. So it would be the same for each country over all points in time. How can I put this into my model? Do I just put the same value for each country over all the points in time and then use xtivreg?


Dipl.-Ök. Matthias Opfinger	

Leibniz Universität Hannover	
Institut für Makroökonomik
Department of Economics

Koenigsworther Platz 1
30167 Hannover

Phone: +49-(0)511-762-5655

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