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Re: st: Checking to see if the association between two variables is linear or otherwise
From
"Justina Fischer" <[email protected]>
To
[email protected]
Subject
Re: st: Checking to see if the association between two variables is linear or otherwise
Date
Sat, 13 Oct 2012 09:25:31 +0200
your suggestion does not resolve the problem that years sof education measure degree very inacurately.
In A US context, 12 and 16 years of education most likely relate to high school degree and bachelor's degree attained four years later.
That Mitchel find splines at these nots suggests that using educational-level-dummies is a very good idea indeed.
Justina
-------- Original-Nachricht --------
> Datum: Fri, 12 Oct 2012 20:25:54 -0700
> Von: William Buchanan <[email protected]>
> An: "[email protected]" <[email protected]>
> Betreff: Re: st: Checking to see if the association between two variables is linear or otherwise
> It's one of the examples in Michael Mitchell's book on data visualization.
> He used knots at 12 and 16 years of education to illustrate how you could
> use splines and the different commands to show the different relationships
> between years of education and earnings.
>
> - Billy
>
> Sent from my iPhone
>
> On Oct 12, 2012, at 20:04, "JVerkuilen (Gmail)" <[email protected]>
> wrote:
>
> > On Fri, Oct 12, 2012 at 10:46 PM, David Kantor <[email protected]> wrote:
> >
> >> I agree, noting that highest grade attained is better than years in
> >> education, but it is still not appropriate, as it is not an interval
> scale.
> >> The "same" increments between values do not have the same significance.
> >> For example, the significance of the increment from grade 11 to 12 is
> not
> >> the same as from 10 to 11.
> >
> > Interesting point. I bet this could probably be ameliorated using
> > regression splines with knots at key grade milestones.
> >
> > Jay
> > --
> > JVVerkuilen, PhD
> > [email protected]
> >
> > "Out beyond ideas of wrong-doing and right-doing there is a field.
> > I'll meet you there. When the soul lies down in that grass the world
> > is too full to talk about." ---Rumi
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