[EM] Open Lists and Closed Lists
Dgamble997 at aol.com
Dgamble997 at aol.com
Mon Jul 28 13:52:39 PDT 2003
Recently their have been a number of posts regarding the merits of open
versus closed lists for list PR. I dislike closed lists and feel that voters not
parties should decide which individuals on a list are elected. However the fact
that in an open list system a vote counts both for an individual and a party
list can produce results unintended by the voters. Take the following example:
3 parties ( A, B and C) are contesting a 5 seat district. Each party puts up
a full slate of 5 candidates. Each voter has 3 votes. 100,000 electors vote,
each voter casts 3 votes.
31% of the voters support party A ( 31,000 voters)
29% of the voters support party B (29,000 voters)
40% of the voters support party C (40,000 voters)
One of the candidates of party B ( B1 ) is a well respected local politician
who is liked by many of party A's supporters. Another of party B's candidates
( B2 ) is very antagonistic to party A.
20% of party A's supporters (6200) vote for candidate B1 and two of their own
B1 is also extremely popular with party B supporters and receives one vote
from almost all of party B's supporters.
Votes received by the candidates of party A and party B are as follows:
A1 26800 B1 34000
A2 21000 B2 18000
A3 16000 B3 16200
A4 12000 B4 15000
A5 11000 B5 10000
Total votes received by each party are as follows: party A 86800, party B
party C 120000.
The D'Hondt highest average formula is used to allocate the seats:
Party A 1 seat, party B 2 seats, party C 2 seats. Seats are allocated to
the candidates on each list who receive the greatest number of votes.
Party B elects candidates B1 and B2.
What would have happened if the 6200 party A supporters hadn't decided to
vote for B1 and had voted for 3 candidates on their own party's list?
The votes for each party would have been as follows: party A 93000, party B
87000, party C 120000. Party A would have obtained 2 seats, party B 1 seat and
party C 2 seats.
The votes for party B candidates would have been as follows:
Candidate B1 the candidate who obtained the extra 6200 from party A and who
party A supporters voted for is still elected. B2 who they don't like is now
By voting for a candidate they liked on another list party A's supporters
have given that list enough extra votes to elect an additional member B2 ( who
they don't like ) and reduced the number of seats obtained by their own party
from 2 to 1.
Because a vote counts for both a candidate and a party voting for candidates
on different lists can result in situations like the above unintended by the
voters and objectionable to them.
The example given above was based on a situation that occurred in the French
Fourth Republic in which Communist voters cross voting for Socialists in an
attempt to defeat the candidate who headed the Communist list succeeded in
giving the Socialist list just enough votes to elect a vehemently anti-Communist
If you must use list PR my preferred type of list is the 'loose' list. A
voter can only vote for one party list but can vary the order of candidates on
that list ( for example in say an 8 member district the voter votes for one list
and up to 4 candidates on that list. The votes for the party lists are used to
allocate the seats between parties and the votes for the candidates to
determine who on the list is elected).
Alternatively you could always use STV where votes only count for the
candidates you vote for, not for candidates of the same party who you don't like and
didn't vote for.
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