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RE: st: xtmixed
From
Schöler, Lisa <[email protected]>
To
"[email protected]" <[email protected]>
Subject
RE: st: xtmixed
Date
Thu, 7 Oct 2010 13:55:16 +0000
Hi,
I used ratios (e.g. income0=income (in 1000s of $)/sales (in 1000s of $)) for the most variables (income, rd ...). Is this a problem?
Thank you
Lisa
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Maarten buis
Sent: Thursday, October 07, 2010 3:39 PM
To: [email protected]
Subject: Re: st: xtmixed
--- On Thu, 7/10/10, Schoeler, Lisa wrote:
> I am having trouble with the command -xtmixed-. After using
> the command below I get this output.
> Now I want to get an output with the individual betas for
> the independent variables for every SIC code. Can anybody
> help me with that?
>
> .xtmixed q0 number_brands market_share intensity
> satisfaction channels margin sga0 rd0 cogs0 lppe0 income0
> lassets0 leverage0 || SIC_twodigits: _brands
> market_share intensity satisfaction channels margin
> -----------------------------------------------------
> number_brands| 6.07e-07
> market_share | 4.82e-07
<snip>
> -----------------------------------------------------
> -----------------------------------------------------
> Random-effects Parameters
> -------+---------------------------------------------
> sd(number_brands) | 1.41e-06
> sd(market_share) | 1.90e-06
<snip>
> -------+---------------------------------------------
The size of the effects of your random variables and their
variance worry me a great deal. Often this occurs when
variables have a wrong scale for the model, for example
annual income in $s rather than 1000s of $. If that is not
the case then there is something very fishy going on with
your model.
Once you have fixed your model you can use -predict- to get
your individual betas for the independent variables for
every SIC code. See -help xtmixed postestimation-.
Hope this helps,
Maarten
--------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany
http://www.maartenbuis.nl
--------------------------
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