[EM] Strategy and Winner-Take-All

Forest Simmons fsimmons at pcc.edu
Mon Mar 11 20:08:16 PST 2002

Are you sure you mean "winner-take-all?"

Single winner elections, whether based on Approval, Condorcet, IRV, Borda,
First-Past-The-Post, etc. tend to be winner-take-all, unless some
agreements are made like, "Youse guys vote for me instead of your
favorite, and I make concessions to your party."

As Bart once pointed out, methods that have the spoiler problem are more
likely to produce such concessions than those that do not.

I suppose a presidential election could be done by Proportional
Representation if you gave the first candidate to reach quota the
presidency, and the second candidate to reach quota the vice presidency.


On Mon, 11 Mar 2002, Narins, Josh wrote:

> Has anyone gone out and proved that a winner-take-all system will always
> result in a two party system, based on the inclusion of all reasonable
> strategies where there is no major information sharing between voters?
> Outside of any state repression of the second candidate's voters, of course
> :)
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