[EM] Retraction about IRV, Brams, and Later-No-Harm

MIKE OSSIPOFF nkklrp at hotmail.com
Tue Dec 23 17:40:02 PST 2003

What Brams showed was that, contrary to the frequent claims of IRV 
promoters, IRV gives strategic incentive to truncate one's ranking.

It was some time ago when I read of that, and a few minutes ago I posted, 
probably mistakenly, that Brams showed that IRV fails Later-No-Harm.

Most likely, in Brams' example, someone truncated, causing  a higher-ranked 
truncated candidate to beat a lower-ranked truncated candidate.

But, if IRV meets Later-No-Harm, that means little. IRV protects your 
favorite from your lower choices by eliminating your favorite before IRV 
lets you help your lower choices. IRV saves your favorite by eliminating 
him. A sort of electoral euthanasia.

If IRV's Later-No-Harm "advantage" is the kind of benefit that we get from 
Later-No-Harm, then it's questionable how important that criterion is.

Mike Ossipoff

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