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Subject: Re: A theory of ratings drift for the SSDF

Author: Dann Corbit

Date: 14:22:49 04/09/02

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On April 09, 2002 at 17:14:55, Ricardo Gibert wrote:
[snip]
>This explains "the rating drift" perfectly.
>
>The first few years, the ratings remains about the same, then suddenly about 100
>rating points disappear in the year 2000. Most of DC's examples follow the same
>pattern.
>
>I think DC will be disappointed that his "discovery" is not going to exactly
>rank right up there with the theory of continental drift ;)

Actually, it is very nice to understand why.  However, it is very puzzling that
the ratings do not move at all then, since much stronger programs are introduced
over time.  My only explanation can be that the ratings are not recalibrated for
the whole set.  The older ratings must be "cast in stone" somehow.



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