[EM] Vote Management
olli.salmi at uusikaupunki.fi
Fri Apr 11 12:40:20 PDT 2003
OK, I get it, I think. If all the parties voted strictly along party
lines, averaging votes wouldn't be necessary, right?
At 22:54 +0100 10.4.2003, James Gilmour wrote:
>> In an STV count, a candidate can win additional votes only as long
>> as he is neither elected nor eliminated. Therefore, when a given
>> party wants to win as many votes as possible during the STV count,
>> this party has to take care that its candidates are as long as
>> possible neither elected nor eliminated. The party achieves this
>> by "averaging" the first preferences over its candidates so that
>> each candidate is just below the Droop Quota.
>Markus is absolutely right. Imagine a party (party "A") that expects to get
>one-and-one-half quotas of first preferences and is popular enough to pick up
>substantial numbers of transferred preferences from supporters of
>other parties at
>later stages in the count. So the party is sure of winning one
>seat, but could be
>in line for two. The party puts up two candidates. If most of the
>to the more popular candidate, that candidate is elected immediately and the
>surplus is transferred to the running mate (assuming strong party
>the supporters). But the small number of votes the running mate
>then has may not
>be enough to prevent the exclusion of that candidate at an early
>So there is no continuing candidate of party "A" to receive any transfers when
>such transfers become available as other candidates are excluded.
>So party "A"
>wins only one seat.
>Now suppose party "A" succeeds in persuading its supporters to
>average their first
>preferences over the two candidates. Neither candidate is elected on first
>preferences, but both have enough votes to keep them in the running
>below them are successively excluded. So both can pick up
>transferred votes and,
>if there enough transfers, both are elected. The parties in Northern Ireland
>certainly work hard to put this into practice where the voting
>patterns suggest it
>will be worthwhile.
More information about the Election-Methods