On Nov 23, 2009, at 1:43 AM, Dave Ketchum wrote:
Seems to me that cycles can occur even with sincerity - they relate to conflict among three or more voter views.
sure, they "can". but i still question the prevalence of such happening. and with the other methods, particularly the two used in governmental elections: FPTP and IRV, the prevalence of tactical voting (particularly compromising) is clear. why is there so much worry about a pathology that just doesn't seem to occur often enough to be worth it when there seems to be plenty reason to worry about pathologies involved with the non-Condorcet methods?
i dunno how to, other than take the raw ballot data of some existing IRV elections, but i would like to see how many of these municipal IRV elections, that if the ballots were tabulated according to Condorcet rules, that a cycle would occur. i know the answer for Burlington 2006 and 2009 (no cycle in either case, the first case the IRV, Condorcet, and FPTP winner was the same person, the second case they were 3 different persons, a clear pathology worth worrying about). what about Cambridge MA or SF, anyone know?
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