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st: Categorical variable in regression
From
John Ataguba <[email protected]>
To
Statalist statalist mailing <[email protected]>
Subject
st: Categorical variable in regression
Date
Wed, 23 Jan 2013 11:22:09 +0000 (GMT)
Dear Statalist members
I have a problem trying to let Stata display coefficients for all the categories of a categorical variable in a regression.
Consider the example below:
**********************************************
clear
set obs 200
set seed 12345
gen region = 1+int((4-1+1)*runiform())
gen y = 10+(56-10)*runiform()
xi: reg y i.region, noconst noomit
**********************************************
I expect Stata to display the coefficients for all the four categories of the categorical variable named "region". However, Stata still omits one category. Is there something I am doing wrong?
I am running Stata 12.1 (SE) on Windows 7 platform. I also tried this in Stata 11.2 (IC) on Windows 7 platform and I obtained the same result.
I will appreciate your assistance.
Regards
Jon
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