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Draft:Post-election pendulum for the 2004 Australian federal election

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The Mackerras pendulum as a way of predicting the outcome of an election contested between two major parties in a Westminster style lower house legislature such as the Australian House of Representatives, which is composed of single-member electorates and which uses a preferential voting system such as a Condorcet method or instant-runoff voting.

The pendulum works by lining up all of the seats held in Parliament for the government, the opposition and the crossbenches according to the percentage point margin they are held by on a two party preferred basis. This is also known as the swing required for the seat to change hands. Given a uniform swing to the opposition or government parties, the number of seats that change hands can be predicted.[1]

Government seats (87)
Marginal
Kingston SA Kym Richardson LIB 0.07
Bonner Qld Ross Vasta LIB 0.51
Greenway NSW Louise Markus LIB 0.58
Wakefield SA David Fawcett LIB 0.67
Makin SA Trish Draper LIB 0.93
Braddon Tas Mark Baker LIB 1.13
Hasluck WA Stuart Henry LIB 1.82
Stirling WA Michael Keenan LIB 2.04
Eden-Monaro NSW Gary Nairn LIB 2.14
Bass Tas Michael Ferguson LIB 2.63
Solomon NT Dave Tollner CLP 2.81
Moreton Qld Gary Hardgrave LIB 4.17
Page NSW Ian Causley NAT 4.23
Bennelong NSW John Howard LIB 4.33
Hinkler Qld Paul Neville NAT 4.81
Deakin Vic Phil Barresi LIB 4.97
McMillan Vic Russell Broadbent LIB 4.99
Lindsay NSW Jackie Kelly LIB 5.26
Corangamite Vic Stewart McArthur LIB 5.32
Boothby SA Andrew Southcott LIB 5.37
Wentworth NSW Malcolm Turnbull LIB 5.48
La Trobe Vic Jason Wood LIB 5.83
Dobell NSW Ken Ticehurst LIB 5.90
Fairly safe
Herbert Qld Peter Lindsay LIB 6.20
Kalgoorlie WA Barry Haase LIB 6.30
McEwen Vic Fran Bailey LIB 6.42
Cowper NSW Luke Hartsuyker NAT 6.45
Sturt SA Christopher Pyne LIB 6.80
Robertson NSW Jim Lloyd LIB 6.81
Paterson NSW Bob Baldwin LIB 6.97
Longman Qld Mal Brough LIB 7.66
Gippsland Vic Peter McGauran NAT 7.70
Dickson Qld Peter Dutton LIB 7.83
Petrie Qld Teresa Gambaro LIB 7.92
Higgins Vic Peter Costello LIB 8.76
Macquarie NSW Kerry Bartlett LIB 8.92
Bowman Qld Andrew Laming LIB 9.12
Dunkley Vic Bruce Billson LIB 9.38
Macarthur NSW Pat Farmer LIB 9.51
Canning WA Don Randall LIB 9.54
Kooyong Vic Petro Georgiou LIB 9.58
Safe
Leichhardt Qld Warren Entsch LIB 10.00
North Sydney NSW Joe Hockey LIB 10.03
Goldstein Vic Andrew Robb LIB 10.03
Gilmore NSW Joanna Gash LIB 10.08
Dawson Qld De-Anne Kelly NAT 10.38
Ryan Qld Michael Johnson LIB 10.42
Forrest WA Geoff Prosser LIB 10.45
Warringah NSW Tony Abbott LIB 10.48
Menzies Vic Kevin Andrews LIB 10.67
Fairfax Qld Alex Somlyay LIB 10.83
Moore WA Mal Washer LIB 10.83
Hughes NSW Danna Vale LIB 11.04
Flinders Vic Greg Hunt LIB 11.11
Blair Qld Cameron Thompson LIB 11.21
Casey Vic Tony Smith LIB 11.35
Tangney WA Dennis Jensen LIB 11.75
Mayo SA Alexander Downer LIB 11.81 v IND
Berowra NSW Philip Ruddock LIB 12.16
Wannon Vic David Hawker LIB 12.37
Wide Bay Qld Warren Truss NAT 12.89
Pearce WA Judi Moylan LIB 12.94
Fisher Qld Peter Slipper LIB 12.98
Forde Qld Kay Elson LIB 12.98
Lyne NSW Mark Vaile NAT 13.03
Aston Vic Chris Pearce LIB 13.15
Grey SA Barry Wakelin LIB 13.82
McPherson Qld Margaret May LIB 13.89
Cook NSW Bruce Baird LIB 13.92
Hume NSW Alby Schultz LIB 14.13
Parkes NSW John Cobb NAT 14.40
Curtin WA Julie Bishop LIB 14.62
Fadden Qld David Jull LIB 15.28
Mackellar NSW Bronwyn Bishop LIB 15.75
Indi Vic Sophie Mirabella LIB 16.29
Gwydir NSW John Anderson NAT 18.39
Bradfield NSW Brendan Nelson LIB 18.51
Groom Qld Ian Macfarlane LIB 18.95
Farrer NSW Sussan Ley LIB 19.82
Barker SA Patrick Secker LIB 19.88
Very safe
Moncrieff Qld Steven Ciobo LIB 20.14
O'Connor WA Wilson Tuckey LIB 20.39
Riverina NSW Kay Hull NAT 20.66
Mitchell NSW Alan Cadman LIB 20.68
Maranoa Qld Bruce Scott NAT 20.93
Murray Vic Sharman Stone Lib 24.08
Mallee Vic John Forrest NAT 24.75
Opposition seats (60)
Marginal
Hindmarsh SA Steve Georganas ALP 0.06
Swan WA Kim Wilkie ALP 0.08
Richmond NSW Justine Elliot ALP 0.19
Parramatta NSW Julie Owens ALP 0.77
Cowan WA Graham Edwards ALP 0.78
Bendigo Vic Steve Gibbons ALP 0.96
Bank NSW Daryl Melham ALP 1.06
Adelaide SA Kate Ellis ALP 1.33
Isaacs Vic Ann Corcoran ALP 1.48
Holt Vic Anthony Byrne ALP 1.51
Ballarat Vic Catherine King ALP 2.23
Chisholm Vic Anna Burke ALP 2.65
Rankin Qld Craig Emerson ALP 3.23
Lowe NSW John Murphy ALP 3.30
Bruce Vic Alan Griffin ALP 3.48
Lyons Tas Dick Adams ALP 3.68
Melbourne Ports Vic Michael Danby ALP 3.74
Brisbane Qld Arch Bevis ALP 3.90
Jagajaga Vic Jenny Macklin ALP 4.40
Brand WA Kim Beazley ALP 4.65
Capricornia Qld Kirsten Livermore ALP 5.14
Lilley Qld Wayne Swan ALP 5.27
Corio Vic Gavan O'Connor ALP 5.64
Fairly safe
Perth WA Stephen Smith ALP 6.73
Prospect NSW Chris Bowen ALP 7.12
Hotham Vic Simon Crean ALP 7.40
Barton NSW Robert McClelland ALP 7.54
Franklin Tas Harry Quick ALP 7.59
Lingiari NT Warren Snowdon ALP 7.66
Fremantle WA Carmen Lawrence ALP 7.76
Charlton NSW Kelly Hoare ALP 7.92
Calwell Vic Maria Vamvakinou ALP 8.19
Griffith Qld Kevin Rudd ALP 8.63
Lalor Vic Julia Gillard ALP 8.79
Kingsford Smith NSW Peter Garrett ALP 9.01
Werriwa NSW Mark Latham ALP 9.31
Maribyrnong Vic Bob Sercombe ALP 9.47
Shortland NSW Jill Hall ALP 9.49
Canberra ACT Annette Ellis ALP 9.62
Oxley Qld Bernie Ripoll ALP 9.72
Newcastle NSW Sharon Grierson ALP 9.98
Safe
Cunningham NSW Sharon Bird ALP 11.46
Reid NSW Laurie Ferguson ALP 12.77
Blaxland NSW Michael Hatton ALP 12.87
Port Adelaide SA Rod Sawford ALP 12.91
Chifley NSW Roger Price ALP 12.98
Denison Tas Duncan Kerr ALP 13.29
Fraser ACT Bob McMullan ALP 13.33
Hunter NSW Joel Fitzgibbon ALP 13.75
Scullin Vic Harry Jenkins ALP 14.79
Gorton Vic Brendan O'Connor ALP 14.90
Gellibrand Vic Nicola Roxon ALP 14.95
Throsby NSW Jennie George ALP 15.00
Watson NSW Tony Burke ALP 15.14
Sydney NSW Tanya Plibersek ALP 16.42
Wills Vic Kelvin Thomson ALP 16.90
Very safe
Melbourne Vic Lindsay Tanner ALP 21.14
Batman Vic Martin Ferguson ALP 21.32
Fowler NSW Julia Irwin ALP 21.36
Grayndler NSW Anthony Albanese ALP 22.60
Crossbench seats (3)
Kennedy Qld Bob Katter IND 18.88 v ALP
New England NSW Tony Windsor IND 21.00 v NAT
Calare NSW Peter Andren IND 21.24 v LIB

References

[edit]
  1. ^ Sakkal, Paul; Rooney, Kieran (14 November 2023). "Veteran Liberal Party MP Russell Broadbent quits party, moves to crossbench". The Sydney Morning Herald.