Re: [EM] What kind of monotonicity whould we exspect from a PR method?

2011-08-09 Thread Juho Laatu
Just another example vote set FYI. 2 AB 2 AC 1 B 1 C 4 D Natural winners are maybe A and D. 100 AB 100 AC 1 B 1 C 4 D Natural winners are maybe B and C. Is it a problem that additional support to A (and B and C) meant that A was not elected? (A was top ranked by all the new voters. B and C we

[EM] What kind of monotonicity whould we exspect from a PR method?

2011-08-08 Thread fsimmons
It seems that if a PR method chose slate {X, Y} for a two winner election, and only X or Y received increased support in the rankings or ratings, then {X, Y} should still be chosen by the method. But consider the following approval profile (for a two winner election): 3 X 1 XY 2 Y 2 Z It seem