*The Single
Transferrable Vote System
The STV system allows people to support
more than one candidate, since it is unlikely that people
will support just one person. In the polling booth they
receive a list of candidates and place a '1' beside their
first preference. They can then place a '2' beside their
second and so on for as many as they want. All the voting
slips are then gathered together for the count. An STV
count is one of the most complicated counts in the world,
often taking 24 hours or more. This is an attempt to
explain what goes on during the count.
The first step is to total up all votes
cast. This is easy and takes a very short time. Using a
special formula, this figure is used to derive a 'quota'
figure. This figure is the number of votes that a
candidate needs in order to be elected. In this election,
there are 6 seats to fill, but STV will work for any
number of seats.
In the next step, all the votes are
separated out into first preferences. In other words,
they are placed into piles for each candidate by
examining where the '1' on each ballot paper has been
placed. These individual piles are then counted
separately. This is known as the 'first count'. Once the
count is over, any candidate that has exceeded the quota
is deemed elected. The returning officer will then
announce these elected candidates and then return to the
count.
The next stage is to take the votes for
each elected member and then split them up by second
preference candidate. These are then counted separately
and the total scaled down to the difference between the
actual votes for the elected members and the quota. A set
of votes equal to the quota is dropped at each step for
each elected candidate. These votes are then distributed
among the other candidates according to their second
preferences. At this stage the quota is re-calculated.
The process will then repeat itself, with members being
elected at each stage until all the seats are filled.
Each time a vote is used, the next preference candidate
marked on each ballot paper is examined.
It is also possible that, in a particular
count, nobody has enough votes to be elected. If this
happens, the candidate with the smallest vote is dropped
and their next preference votes redistributed. Sometimes
several candidates have to be dropped before a candidate
can be elected. Since votes are scaled at each stage, it
is worth noting that at each stage some votes will be
worth '1' with others worth less than 1.
While complicated, STV works well and has
many advantages. It also lends itself particularly well
to electoral strategy, with many seats being allocated on
unexpected transfers of votes.
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