[EM] Gerrymandering Hare was: More religious chanting by David

Blake Cretney bcretney at postmark.net
Tue Nov 23 11:19:17 PST 1999


Donald E Davison wrote:

> Greetings,
> 
> David Catchpole wrote: "That's Droop with the addition of districts-
> remember that Hare can do the same!"
> 
> Dear David,
> 
>      You are in error, as usual. It is not Hare that can do the same, it is
> the exhausted ballots that can cause candidates to be elected with less
> than a quota in either Hare or a Droop election.
>      The only proper way to compare Hare to Droop is to conduct any test
> without exhausted ballots.
>      So, your assignment, if you care to take it, is to show that a 48%
> group can gain a majority of the seats in a Hare election.
>      The only condition is that each member must be elected by a full Hare
> quota, this would mean no exhausted ballots. To elect by less is to elect
> by a shade of Droop.
>      Otherwise you can use districts or an one area election. You can
> gerrymander the districts any way you wish.
>      But, I'll give you the results. The 48% group will not be able to
> elect more than 48 members per 100.
>      Hare will not do the same.
> 
>      No matter what is said about Hare, Droop is not improved one lick.
>      Your bad mouthing of Hare is merely more religious chanting - belief
> without question. You are keeping the faith.

Party Votes  Vote%
A     480    48%
B     520    52%

All voters will make full rankings, so there will be no exhausted
ballots.

Single District (Using STV-Hare)

District 1  220 A votes, 280 B votes

37  A1 A2 A3 A4 A5 A6 B1 B2 B3 B4 B5 B6
37  A2 A1 A3 A4 A5 A6 B1 B2 B3 B4 B5 B6
37  A3 A1 A2 A4 A5 A6 B1 B2 B3 B4 B5 B6
37  A4 A1 A2 A3 A5 A6 B1 B2 B3 B4 B5 B6
36  A5 A1 A2 A3 A4 A6 B1 B2 B3 B4 B5 B6
36  A6 A1 A2 A3 A4 A5 B1 B2 B3 B4 B5 B6
280 B1 B2 B3 B4 B5 B6 A1 A2 A3 A4 A5 A6

Result is
A 5
B 5

District 2  260 A votes, 240 B votes

44  A1 A2 A3 A4 A5 A6 B1 B2 B3 B4 B5 B6
44  A2 A1 A3 A4 A5 A6 B1 B2 B3 B4 B5 B6
43  A3 A1 A2 A4 A5 A6 B1 B2 B3 B4 B5 B6
43  A4 A1 A2 A3 A5 A6 B1 B2 B3 B4 B5 B6
43  A5 A1 A2 A3 A4 A6 B1 B2 B3 B4 B5 B6
43  A6 A1 A2 A3 A4 A5 B1 B2 B3 B4 B5 B6
240 B1 B2 B3 B4 B5 B6 A1 A2 A3 A4 A5 A6

Result is
A 6
B 4

So, A wins 11 to 9.
Party  Vote%  Representation%
A      48%    55%
B      52%    45%

---
Blake Cretney



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