[EM] Condorcet same as Approval with partial info?

Bart Ingles bartman at netgate.net
Sun Feb 20 22:14:54 PST 2000



Bart Ingles wrote:
>
> Predicted
> Votes       Candidate(utility)
> -------------------------------
> 04      A(1.0)   B(0.1)   C(0)
> 45      A(1.0)   B(0.9)   C(0)
> 02      B(1.0)          A=C(0)
> 45      C(1.0)   B(0.9)   A(0)
> 04      C(1.0)   B(0.1)   A(0)
> 
> Condorcet strategy:
> 
> 04  AC
> 45  AB
> 02  B
> 45  CB
> 04  CA
> 
> 53 AB 47
> 53 CB 47
> 49 AC 49  ... either A or C wins


I just realized that the two 45-member groups can counter the 4-person
groups' strategy by elevating B equal their favorite:

04  AC
45  A=B
02  B
45  C=B
04  CA
 
47 BA 8
47 BC 8
49 AC 49  ... B wins



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