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st: Fixed effects = insufficient observations?

From   Tharshini Thangavelu <>
To   <>
Subject   st: Fixed effects = insufficient observations?
Date   Fri, 17 Sep 2010 11:59:17 +0200

Dear stata list members,

I have a problem concerning fixed effects. I have a dataset which consists
of variables that I have merged from different sources. It is a
longitudinal data (= panel data) for 187 countries for year between
1970-2010. It is an unbalanced dataset. The dataset consists of variables
such as doing business from the worldbank, GEM and COMPENDIA. 

When I try to do a fixed effects regression, I get a message: insufficient
obervations. I try with different specifications.
As my control variables, I have, all doingbusines variables(only
rankings), GDP per capita, education, unemployment and industry structure.
When I exclude education variable (= gross enrollement rate (%) secondary
from teh WorldBank, the obervations can be more than 100), it seems to be

The education variable is a integer variable and I have other variables
that are integer without any kind of problems. Have someone had the same
problem with this variable? 


Tharshini Thangavelu

Forskarbacken 19, 2tr

114 16 Stockholm

Mob 0735 53 43 90


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