[EM] Real IRV Election, Disputable Result

[Brian Olson]

Oops!

And a good thing for double checks!

The good thing about having implemented all these things 4-5 times is  
that I had another set of code to check myself against, and that  
agreed with Mr. LeGrand's calculations. I found the bug in my new  
code which erroneously reported that IRV and VRR disagreed on this one.

Now all is agreement, so we must even be counting tie-rank-votes the  
same.

Fixed results of a bunch of systems at these spots:
http://two.bolson.org/a.html
http://two.bolson.org/2b.html

On Mar 10, 2006, at 11:25 PM, Rob LeGrand wrote:

> I took the raw data from the site Brian Olson posted and ended up  
> with a
> slightly different pairwise table:
>
>      (0)  (1)  (2)  (3)  (4)  (5)
> (0)    - 5545 6747 3991 6790 7336
> (1) 3556    - 5165 3397 5136 5875
> (2) 1161 1289    -  804 2028 3290
> (3) 4763 5730 6961    - 7027 7351
> (4)  987 1318 1869  603    - 3094
> (5)  323  311  431  194  510    -
>
> (0) Hinda Miller
> (1) Kevin J. Curley
> (2) Louie The Cowman Beaudin
> (3) Bob Kiss
> (4) Loyal Ploof
> (5) Write-ins
>
> It's identical to the one at http://two.bolson.org/a.html except  
> for the
> first column: I have Hinda Miller with many more votes against  
> her.  I've
> looked for errors in my results but haven't found the problem.  If I'm
> right, the Condorcet winner changes from Miller to Bob Kiss, the IRV
> winner.  I think finding a real-world election in which IRV failed to
> elect the voted Condorcet candidate would be quite significant, so I'm
> hoping my results are wrong, but they do seem more consistent with the
> final round of the real IRV election (although they're still off by a
> handful of ballots).  It'd be great if someone else could take the raw
> data from the election page and triple-check the results  
> independently.
> Regardless of the result, thanks to Brian for pointing this out.
>
> --
> Rob LeGrand, psephologist
> rob at approvalvoting.org
> Citizens for Approval Voting
> http://www.approvalvoting.org/