[EM] Consensus?: IRV vs. Primary w/Runoff

[Markus Schulze]

Dear Forest,

you wrote (4 Feb 2002):
> It seems to me that election methods can potentially have two kinds of
> problems with clones: (1) Some methods tend to give an advantage to
> parties that runs lots of clones. (2) Other methods tend to penalize
> parties that run lots of clones.

Actually, there are three problems with clones. Blake Cretney
calls these problems "teaming," "crowding" and "vote-splitting":
http://www.fortunecity.com/meltingpot/harrow/124/defn.html

IRV is immune from all three clone strategies.

******

You wrote (4 Feb 2002):
> Nurmi rates both Top Two Runoff and IRV at level IV (Roman Numeral Four)
> in his classification.  Approval is rated at level II, which means he
> considers Approval two levels more manipulable than IRV, because Approval
> strategy is that much simpler. But you are right that Nurmi should
> consider Top Two Runoff as more manipulable by his criterion. Perhaps
> he does, but not enough to put it at level V.

I guess you mean: "Perhaps he does, but not enough to put it at
level III."

Markus Schulze