[EM] Re: Strong Favourite Betrayal Criterion at last!

[Chris Benham]

Forest,
My answer to your question "Is there a simpler method that factors allof 
the strategy away from the rankings or ratings of the candidates?" is 
yes. Voters can rank  and also Approve whichever candidates they please, 
not even neccessarily Approving the candidate they rank as number1.
The method  is to have an IRV-like count, except that the candidates who 
are in turn eliminated are those who are the least Approved.
For example, in a 3 candidate race in which you doubt that  Favourite 
can beat Worst  in a runoff, you might number the candidates  1. 
Favourite  2. Middle  3. Worst  , but  only  Approve Middle .
Chris Benham