[EM] Efforts to improve on CR's strategy

Adam H Tarr atarr at ecn.purdue.edu
Sat May 22 21:29:01 PDT 2004


Ken Johnson wrote:

>The proposed "Normalized CR" method is as 
>follows:
>(1) Voters give candidates CR ratings. There no need for any range limit 
>- any finite CR value, positive or negative, can be allowed.
>(2) Apply an additive shift to each voter's CR profile so that the sum 
>of the absolute values is minimized.
>(3) Apply a multiplicative scale factor to each voter's CR profile so 
>that the sum of the absolute values is 1.
>(4) After applying the above transformations, select the candidate with 
>the highest average CR.
>
>The basic idea is that scaling the sum of the absolute values to 1 is a 
>better way of limiting individual voting power than restricting 
>individual CR's to a fixed range (e.g. 0 to 1). With a fixed range, the 
>optimum strategy is to give all candidates polarized ratings - 
>equivalent to Approval. But the above normalization process removes the 
>incentive for voters to polarize their ratings, and they are more likely 
>to vote sincerely. (At least that's my hypothesis, I'm not sure if it's 
>actually true.)

I doubt it would be true.  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.

-Adam




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