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st: Heavy representation in a sample


From   Claude Francoeur <[email protected]>
To   "[email protected] >> \"[email protected]\"" <[email protected]>
Subject   st: Heavy representation in a sample
Date   Sun, 20 Mar 2011 13:51:30 -0400

Hello,

I would like to know if there is any econometric problem when making an OLS regression using a sample that is heavily represented by a subset within a variable? For instance, we are using country legal systems as an explanatory variable : 65% is Anglo-Saxon and the rest is divided between French, German and Scandinavian. Is there any econometric problem using such a sample? If so, what are the methods to correct it?

Thank you,

Claude

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