[EM] STV is suppose to be a PR method.

[Markus Schulze]

Dear participants,

suppose that there are 5 seats and 100 voters so that
the Hare Quota is 20. Suppose that party A nominates
candidate A1, A2, and A3 and that party B nominates
candidate B1, B2, and B3. Suppose that every voter
makes a full ranking of all six candidates and that
52% of the voters prefer every candidate of party A
to every candidate of party B and that 48% of the
voters prefer every candidate of party B to every
candidate of party A.

Then it could happen that candidate A1 and A2 each
get 20% of the first preferences, that candidate A3
gets 12% of the first preferences, and that candidate
B1, B2, and B3 each get 16% of the first preferences.
STV with the Hare Quota would elect candidate A1 and A2,
then eliminate candidate A3, and then elect candidate
B1, B2, and B3 so that party A gets 2 seats for 52% of
the votes and party B gets 3 seats for 48% of the votes.

To my opinion, the example above questions whether
STV with the Hare Quota is really proportional.

Markus Schulze