[EM] San Francisco pairwise tallies

Bart Ingles bartman at netgate.net
Thu Nov 11 20:44:30 PST 2004

I'm surprised the complete ballots were available in a form that would 
allow pairwise tallies.

 From the Chronicle article I saw, it looked as though _none_ of the 
four races requiring a second round ended up with the eventual winner 
recieving a majority of votes.  Did this turn out to be the case?

If so, I wonder if SF removed the "majority" requirment from their city 
charter when IRV was implemented.  Could be messy otherwise.


Justin Sampson wrote:

> Hello,
> I'm new to the list. I'm a San Francisco resident and a software engineer,
> and I've recently gotten interesting in election methods. I have performed
> some alternative tallies of our ranked-choice ballots from last week:
>   http://www.sampsonsynergetics.org/ranked-choice-results.html
> I'm a bit mystified by the problems they ran into trying to do the instant
> run-off, since a full pairwise tally only took a few seconds on my old
> laptop. Of course the software and hardware designs are proprietary so we
> can't review them to understand what happened and how they fixed it...

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