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Subject: Re: Is there a rating inflation?

Author: Sune Fischer

Date: 11:51:23 06/03/02

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On June 03, 2002 at 14:39:22, Sune Fischer wrote:


>You have
>Elo_1970(strength)=F(T_1970(strength)) and
>Elo_2002(strength)=G(T_2002(strength)), now F(T(..)) and G(T(..)) are known
>distributions, namely the ratinglists.
>But we want to find how the strength evolved in time, how do we do that?
>
>If you treat F,G and T as unknowns (as I do), then you will get nowhere in you
>analysis, you need to make assumtions or approksimations, that is unless I'm
>overlooking something ;)

Perhaps
Elo_1970(strength)=F(S(1970),1970) and
Elo_2002(strength)=G(S(2002),2002), would have been a better nameing
convention;)
So S is strength as function of time, and F and G are inflations, also functions
of time.
It seems hard to seperate S(time) from the other unknown functions, but perhaps
statistics has methods?

-S.



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