[EM] Margins

[Kevin Venzke]

Dave,

--- Dave Ketchum <davek at clarityconnect.com> a écrit : 
> >>  If the voter leaves two candidates unranked, 
> >>  don't count that as a half vote for each, count it 
> >>  as zero for each.  But if the voter explicitly ranks 
> >>  two candidates as equal, count that as a half vote 
> >>  for each.
> > 
> > Does anyone know who devised this?
> 
>   I do not claim devising, but I argue for this, for both wv and margins:

Since you argue for it, I want to name it after you.  Unless someone complains,
I am going to start calling it the "Ketchum" measurement of defeat strength.

Since Ketchum is a compromise between WV and Margins, it doesn't make sense to say 
you advocate it "for both wv and margins."  It only makes sense to advocate it 
*instead* of WV or Margins.

I think you doubt this, so I'll give some brief definitions to make this
clearer:

WV: Equal-ranking and truncation result in no vote for either candidate.

Margins: Equal-ranking and truncation result in 1/2 vote for each candidate.

Ketchum: Equal-ranking results in 1/2 vote for each candidate, but truncation
results in no vote for either candidate.

These can also be shown in a table:

measure     ranked equal      truncated
WV           0 votes           0 votes
Margins      1/2 vote          1/2 vote
Ketchum      1/2 vote          0 votes

Kevin Venzke
stepjak at yahoo.fr


	

	
		
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