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Re: st: about residuals and coefficients
From
Yuval Arbel <[email protected]>
To
statalist <[email protected]>
Subject
Re: st: about residuals and coefficients
Date
Fri, 6 Sep 2013 17:12:34 +0300
David,
Unlike Federico, it is not clear to me how can you design a social
science experiment that keeps all the predictors constant (except for
the one you would like to check).
The only thing that comes to my mind - is to ask subjects to fulfill a
detailed questionnaire with background questions prior to
participation in the experiment, and then to use regression analysis.
I also don't understand the difference between analysis of variance
and regression analysis. i believe these terms are identical (i.e.,
ANOVA equals regression analysis)
On Fri, Sep 6, 2013 at 2:53 PM, Federico Belotti <[email protected]> wrote:
> David,
>
> tks for your explanation. It is enough.
> My request was just to be sure that what I had in mind was the right story.
>
> Federico
>
> On Sep 6, 2013, at 1:00 PM, David Hoaglin wrote:
>
>> Federico,
>>
>> Briefly (I have little time now before leaving to catch a plane), I
>> had in mind a variety of designed experiments (and some surveys) that
>> collect data for combinations of levels of several variables. The
>> design ensures that one can change a given variable and hold other
>> variables constant, because each of those combinations is supported by
>> data. The analyses tend to use analysis of variance, rather than
>> regression.
>>
>> In any analysis, the data are the key to whether a statement about
>> holding variables constant is well supported or is an extrapolation of
>> some kind.
>>
>> David Hoaglin
>>
>> On Fri, Sep 6, 2013 at 3:37 AM, Federico Belotti <[email protected]> wrote:
>>> David
>>>
>>> I found your point on the absence of equal conditions unless the data are collected to produce such structure rather intriguing. Could you please clarify your statement?
>>>
>>> Tks
>>> Federico
>> *
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>
> --
> Federico Belotti, PhD
> Research Fellow
> Centre for Economics and International Studies
> University of Rome Tor Vergata
> tel/fax: +39 06 7259 5627
> e-mail: [email protected]
> web: http://www.econometrics.it
>
>
> *
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--
Dr. Yuval Arbel
School of Business
Carmel Academic Center
4 Shaar Palmer Street,
Haifa 33031, Israel
e-mail1: [email protected]
e-mail2: [email protected]
You can access my latest paper on SSRN at: http://ssrn.com/abstract=2263398
You can access previous papers on SSRN at: http://ssrn.com/author=1313670
*
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