-areg- was updated 17jun2005
"1. areg failed when attempting to fit a constant-only model. This
has been fixed."
Is your Stata up to date? Try -update query-
-areg- without any RHS variables works fine for me:
. sysuse auto
(1978 Automobile Data)
. areg mpg ,ab(rep)
Linear regression, absorbing indicators Number of obs
= 69
F( 0, 64)
= .
Prob > F =
R-squared
= 0.2348
Adj R-squared
= 0.1869
Root MSE
= 5.2897
-----------------------------------------------------------------------
-------
mpg | Coef. Std. Err. t P>|t| [95% Conf.
Interval]
-------------+---------------------------------------------------------
-------
_cons | 21.28986 .6368064 33.43 0.000 20.01769
22.56202
-------------+---------------------------------------------------------
-------
rep78 | F(4, 64) = 4.909 0.002 (5
categories)
Scott
----- Original Message -----
From: lena Lindahl <[email protected]>
Date: Thursday, February 2, 2006 6:13 am
Subject: st: Question on -Areg- command
> Hi!
> I have a question on the -Areg- command.
> In the STATA manual it is used in the following example:
>
> areg mpg gratio, absorb(rep78).
>
> I would like to run a regression with a very large amount of dummy
> variables.
> Using the example, I would like to run the regression without the
> right
> hand side variable, gratio, and so only estimate the effect of the
> absorbed dummy variables represented by rep78. (I am only
> interested in
> the adj R2 value.) But it is not possible to leave out variable
> gratio,
> the error message states "varlist required".
>
> Anyone who has an idea?
>
> All the best/
> Lena
>
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