[EM] Juho: Bias
Michael Ossipoff
email9648742 at gmail.com
Mon Jul 2 17:51:09 PDT 2012
Here is what I mean by "bias". I claim that my meaning for bias is
consistent with the usual understood meaning for bias::
For any two consecutive integers N and N+1, the interval between those two
integers is "Interval N"
If it is equally likely to find a party with its final quotient anywhere in
interval N, then determine the expected s/v for parties in interval N.
Compare that expected s/v for some small value of N, with the expected
value of s/v for some large value of N.
If the latter expected s/v is greater than the former, when using a certain
seat allocation method, then that allocation method is large-biased.
If the opposite is true, then the method is small-biased.
If the expected s/v is equal for the two values of N, then the method is
unbaised, under the assumption that a party is equally likely to be found
anywhere
within whichever interval that you're considering.
That's what I mean by bias, under the above-stated assumption.
What if that assumption isn't quite correct? Then Sainte-Lague is very
slightly large-biased.
Bias compares the expected s/v, in two intervals such as I described above.
Mike Ossipoff
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