[EM] my letter to CVD

[Bart Ingles]

This raises a question which has been in the back of my mind for a
while:  what percentage of IRV's IIA violations are actually
monotonicity violations as well?  I have always assumed that
non-monotonicity implies non-IIA, but not necessarily the reverse.

Monotonicity seems related to the participation criterion.  Are there
any examples of violations of these which are not already IIA or FBC
violations?

Bart


Adam Tarr wrote:
>
> I think you're being a bit too kind to IRV here.  Say it was a general
> election in an area with a large progressive base, and the 22% Democrat was
> actually a Green.  If the Green loses first, the Democrat wins 55%-45%, but
> if a few Republicans push the Green over the Democrat by putting him in
> first place, then the Republicans will win as long as roughly a third of
> the Democratic voters prefer the Republican to the Green.