<HTML><FONT FACE=arial,helvetica><HTML><FONT SIZE=2 PTSIZE=10 FAMILY="SANSSERIF" FACE="Arial" LANG="0">Bart Ingles wrote:<BR>
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>But truncation is equivalent to equal last-choice preference for all of<BR>
>the methods listed below.<BR>
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Yes, it is equivalent but expressing an equal preference for two or more candidates is generally considered as different to not ranking candidates you don't like.<BR>
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>> A>B means voters rank A first and B second and C not at<BR>
>> all.<BR>
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>How is this different from ranking C last? In other words, how is A>B<BR>
>different from A>B>C?<BR>
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It isn't and I've never said it was (except in the case of Bucklin). <BR>
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>Good strategy requires either cardinal utilities or strategic info, or<BR>
>preferably both. Although I suppose you could assume pure strategy if<BR>
>you also assume that each voter knows how all the other will vote. In<BR>
>that case approval should be essentially equivalent to Condorcet.<BR>
<BR>
Please explain further, with 3 candidates Approval strategy comes down to either approving one candidate (your first choice) or two ( your first and second choice).<BR>
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>> In strategic voting whether A>B voters approve A or A and B<BR>
>> depends on how the voters respond to the information in an opinion<BR>
>> poll using strategy A. In non-strategic voting the voters approve all<BR>
>> candidates they like and hence A>B voters approve both A and B.<BR>
<BR>
>Again, this last assumption either invalidates the approval results or<BR>
>the ranked ballot results (or both). If you assume that the voters<BR>
>truncate all preferences that they wouldn't approve of under approval<BR>
>voting, then you are altering the ranked system results. If, on the<BR>
>other hand, you assume that the voters only truncate when they sincerely<BR>
>don't have a preference between the truncated candidates, then your<BR>
>approval results are invalid.<BR>
<BR>
Any assumptions made in the model are clearly stated in the instructions.<BR>
<BR>
You appear to be criticising the model on a lack of information. I will happily send you one if you want.<BR>
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David Gamble<BR>
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