[EM] Efforts to improve on CR's strategy

[Kevin Venzke]

Ken,

 --- Ken Johnson <kjinnovation at earthlink.net> a écrit : > 
> >From: Adam H Tarr <atarr at ecn.purdue.edu>
> >...  My first guess at a strategy:
> >
> >1) Identify the two frontrunners, and pick your favorite among them.
> >2) Give your favorite frontrunner a 10, your less favored frontrunner a 0, and 
> >everyone else a 5.
> >
> >This maximizes your impact on the important contest - the one between the 
> >frontrunners.
> 
> That certainly makes sense if only two candidates have a significant 
> chance of winning. But in general, why limit it to two front-runners? 

Because methods that let you cast a total of (some amount) of votes,
like Plurality and cumulative voting, encourage voters and parties to get
behind two candidates, so that their votes are as powerful as possible.

Ordinary CR is better than normalized CR because it would not have that
effect.  You would be able to give full support to your favorite candidates
without having to worry that this will hurt "more realistic" compromise
choices.

> What if there are 5 candidates who are likely to win (you may not know 
> which is more likely), and 5 other candidates who are just jokers doing 
> a publicity stunt?

That would be different, yes.

> If you're voting strategy is based on who you think is or is not likely 
> to win, that suggests an IR-type approach, such as Brian Olson's 
> "Instant Runoff Normalized Ratings" (IRNR),
> http://lists.electorama.com/pipermail/election-methods-electorama.com/2004-May/012885.html

Hmm, Plurality, cumulative voting, IRV, Approval, and CR all suggest this
sort of strategy.

> The basic idea is to normalize the ratings, disqualify the candidate 
> with the lowest average rating, and repeat until there's only one left. 
> Is there a way to beat the system (strategically) with this method?

Well, it's certainly possible to kick yourself in the ass by voting sincerely...
The method is not so different from IRV.

Kevin Venzke
stepjak at yahoo.fr



	

	
		
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