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Re: st: Binary Variables


From   Natalie Trapp <natalie.trapp@zmaw.de>
To   statalist <statalist@hsphsun2.harvard.edu>
Subject   Re: st: Binary Variables
Date   Wed, 02 Jun 2010 16:03:28 +0200

Hi Neil,

I use Stata 11 and do a normal OLS estimation (with the "reg" command):

y = dependent variable (agricultural inputs)
x = independent variables (climate variables, crops, etc.) and dummy
variables that represent the 150 regions within the EU

The coefficients of the dependent variable within each region are very
divers and significant for about 120 regions.


My Problem is for instance, when "Schleswig Holstein" is my reference
group, Stata adittionally omits Valle d'Aoste, Vlaanderen and Ile de France.
Still, I don't quite understand why Stata does it, because the regions
(Germany, France, Netherlands) do not seem to be similar to me.


Kind regards,
Natalie





On 6/2/2010 2:11 PM, Neil Shephard wrote:
 On Wed, Jun 2, 2010 at 11:42 AM, Natalie Trapp<natalie.trapp@zmaw.de>   wrote:

 Thank you very much.
 It is not possible that my dependent variable is constant within a region
 and I want to have the effects
 of different regions....

 As per the Statalist FAQ (linked in the footer of all messages from
 the list), if you could show _exactly_ what you are typing/entering
 into Stata and the output as well people might be able to offer more
 advice.

 Have you checked what levels the dependent variable takes within each region?

 Neil






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