[EM] Easy fix to Alaska's ranked-choice voting

[Kristofer Munsterhjelm]

On 12.11.2022 02:26, Colin Champion wrote:
> On 11/11/2022 20:49, Forest Simmons wrote:
>>
>> Since almost all RCV implementations limit the number of candidates 
>> that can be ranked on a ballot, the simplest decent  RCV method is ... 
>> Elect the uncovered candidate that is unranked on the fewest ballot
>>
> Does anyone know why this truncation is imposed? If it’s to limit the 
> amount of work needed to count the ballots, wouldn’t it make sense for 
> Condorcet supporters to advocate a method which was countable in linear 
> time? In practice this would presumably be Sequential Pairwise 
> Elimination with an FPTP pre-ranking. If you insist on a quadratic time 
> method and accept the corollary of ballot truncation, I don’t imagine it 
> will work very well. Or am I missing something?

Forced ballot truncation clearly makes every voting method fail clone 
independence, so no, it's not just you.

As an extension of my Friendly Cover/Voting caveat (where it's difficult 
to call a winner because first preferences are all distributed among 
nobodies), forced ballot truncation probably also implies ISDA failure. 
Perhaps even Smith failure, or Condorcet in pathological cases.

-km