[EM] Condorcet How?

robert bristow-johnson rbj at audioimagination.com
Wed Mar 24 05:21:15 PDT 2010

On Mar 24, 2010, at 4:42 AM, Kristofer Munsterhjelm wrote:

> robert bristow-johnson wrote:
>> On Mar 23, 2010, at 9:01 AM, Terry Bouricius wrote:
> [...]
>>> Since the bill, as passed, actually
>>> used a top-two contingent system (only the top two initial  
>>> candidates
>>> would advance), the tally would be relatively easy.
>> so the regional venues would report 1st-choice tallies and *wait*  
>> for the central counting venue to indicate who the top two vote  
>> getters are?  then the regional venues do a pairwize tally between  
>> the two?  is that how it would be done?  that's possible, but it  
>> requires a two-way communication and a deferred counting action  
>> later in the evening of Election Day.
> A top-two contingent system is actually summable. First, count  
> Plurality. Second, count the pairwise matrix.

yeah, you're right.  Plurality and Condorcet are both precinct  
summable and 2R IRV can be constructed out of the two.  it was  
obvious, but i hadn't been thinking of that.

sorry, Terry.  other than the normal issue i have with either 2 Round  
Delayed or Instant Runoff (the two candidates advanced to the runoff  
might not include the Majority Winner), then this isn't such a mess  
for a statewide race.


r b-j                  rbj at audioimagination.com

"Imagination is more important than knowledge."

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