[EM] Approval Voting vs Instant Runoff Voting

[MIKE OSSIPOFF]

>>LAYTON Craig wrote:
>
> > Mike wrote:
> >
> > >Not reassuring when your crucial 2nd choice compromise isn't there
> > >anymore because he got eliminated while your single traveling vote
> > >was on your favorite. Your vote will not be dropped? Your preference
> > >for Middle over Worst won't get counted. At least Approval reliably
> > >counts every preference that you vote.
> >
> > This is only true because you're forced in such a situation by Approval 
>to
> > only express one preference - either favourite over middle or middle 
>over
> > worst.  IRV counts one of these preferences, Approval counts one of 
>these
> > preferences.  I don't see how you can say one is worse than the other in
> > this regard.

The difference is that Approval will count exactly those mutually
Approval-compatible preferences that you want counted, without
any need to dump your favorite by voting someone else over him.

IRV can be made to count a preference that's important to you, but
sometimes only by voting your compromise insincerely in 1st place, over your
favorite. If you don't do that, IRV will decide which preferences get
counted, and if you needed Middle>Worst to be counted, you might  be
out of luck if you didn't insincerely uprank Middle over Favorite.

Mike Ossipoff


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