I do not really know what to make of the normality issue; there is no
requirement on the covariates being normal, AFAIK. If you want to test the
validity of your interaction, -generate- the product of the two and add it
to your covariates. Then see what kind of an effect (sign, p-value) comes
out of it. Be warned, though: We had a few posts recently about -nl- and how
it is able to see that you used the same covariate twice and adjust the
resulting marginal effect for -mfx- while -regress- would not know that you
threw in the covariate itself and some kind of interaction of it with other
covariates...
HTH
Martin
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Apu Chakraborty
Sent: Tuesday, September 02, 2008 12:12 PM
To: [email protected]
Subject: st: Testing for interaction within linear regression
Dear All
I have Stata 9 and wish to test a variable for putative interaction in a
linear regression model where the predictor and dependent variables are
normally distributed. Please could someone let me know how to do this.
Thanks
Apu
Sent from my BlackBerryR wireless device
-----Original Message-----
From: "Ashim Kapoor" <[email protected]>
Date: Tue, 2 Sep 2008 14:46:16
To: <[email protected]>
Subject: Re: st: RE: Getting label name of a variable
Thank you Martin!
Ashim.
On Tue, Sep 2, 2008 at 2:02 PM, Martin Weiss
<[email protected]> wrote:
> -help extended_fcn-
>
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Ashim Kapoor
> Sent: Tuesday, September 02, 2008 10:18 AM
> To: [email protected]
> Subject: st: Getting label name of a variable
>
> Hello everyone,
>
> Supposer I have a var " var1 " having a label " years" . Can I get
> the label of " var1 " and store it in a local macro ?
>
> Thank you,
> Ashim.
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