[EM] MCA Participation failure example

[Kevin Venzke]

I found how MCA fails Participation.  It seems pretty mild, though:

5: A>B>C
4: B>C>A

A is a majority favorite and wins.

But add these in:
2: C>A>B

There is no majority favorite and B wins by greatest approval.

The two voters would have done better to not cast these votes.  Or, if they
had polling info, they should've voted CA>>B.  Best not to waste the first rank
on an unviable candidate.

The reason I don't think this is a severe violation is that it should only
happen when your vote prevents someone from winning with a majority, giving
victory to someone you like less.


Kevin Venzke
stepjak at yahoo.fr


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