Post-election pendulum for the Queensland state election, 2017

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The following is a Mackerras pendulum for the Queensland state election, 2017 .

The Mackerras pendulum was devised by the Australian psephologist Malcolm Mackerras 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 IRV.

"Safe" seats require a swing of over 10 per cent to change, "fairly safe" seats require a swing of between 6 and 10 per cent, while "marginal" seats require a swing of less than 6 per cent.

LABOR SEATS (48)
Marginal
Townsville Scott Stewart ALP 0.4
Gaven Meaghan Scanlon ALP 0.7
Mundingburra Coralee O'Rourke ALP 1.1
Aspley Bart Mellish ALP 1.2
Mansfield Corrine McMillan ALP 1.6
Barron River Craig Crawford ALP 1.9
Maryborough Bruce Saunders ALP 2.5 v ONP
Keppel Brittany Lauga ALP 3.1 v ONP
Redlands Kim Richards ALP 3.1
Cairns Michael Healy ALP 3.4
South Brisbane Jackie Trad ALP 3.6 v GRN
Springwood Mick de Brenni ALP 3.6
Thuringowa Aaron Harper ALP 4.1 v ONP
Ferny Grove Mark Furner ALP 4.6
Redcliffe Yvette D'Ath ALP 4.9
Rockhampton Barry O'Rourke ALP 5.2 v ONP
Cook Cynthia Lui ALP 5.8 v ONP
Mount Ommaney Jess Pugh ALP 5.8
Fairly safe
Bancroft Chris Whiting ALP6.2
Pine Rivers Nikki Boyd ALP6.2
Logan Linus Power ALP6.8 v ONP
Kurwongbah Shane King ALP7.0
Macalister Melissa McMahon ALP7.4
Capalaba Don Brown ALP7.9
McConnel Grace Grace ALP7.9
Miller Mark Bailey ALP8.2
Mackay Julieanne Gilbert ALP8.3
Ipswich West Jim Madden ALP8.7 v ONP
Morayfield Mark Ryan ALP8.7 v ONP
Murrumba Steven Miles ALP9.5
Jordan Charis Mullen ALP9.9 v ONP
Stretton Duncan Pegg ALP9.9
Safe
Toohey Peter Russo ALP10.0
Greenslopes Joe Kelly ALP10.1
Cooper Kate Jones ALP10.6
Waterford Shannon Fentiman ALP10.7 v ONP
Bulimba Di Farmer ALP10.8
Ipswich Jennifer Howard ALP10.9 v ONP
Mulgrave Curtis Pitt ALP10.9
Lytton Joan Pease ALP12.0
Stafford Anthony Lynham ALP12.1
Sandgate Stirling Hinchliffe ALP13.5
Nudgee Leanne Linard ALP14.3
Algester Leeanne Enoch ALP14.4
Gladstone Glenn Butcher ALP20.7 v ONP
Bundamba Jo-Ann Miller ALP21.6
Inala Annastacia Palaszczuk ALP26.1
Woodridge Cameron Dick ALP26.4
LIBERAL NATIONAL SEATS (39)
Marginal
Whitsunday Jason Costigan LNP 0.7
Burdekin Dale Last LNP 0.8
Pumicestone Simone Wilson LNP 0.8
Bonney Sam O'Connor LNP 2.2
Clayfield Tim Nicholls LNP 2.4
Chatsworth Steve Minnikin LNP 2.9
Currumbin Jann Stuckey LNP 3.3
Caloundra Mark McArdle LNP 3.4
Glass House Andrew Powell LNP 3.4
Coomera Michael Crandon LNP 3.5
Theodore Mark Boothman LNP 3.7
Lockyer Jim McDonald LNP 4.1 v ONP
Bundaberg David Batt LNP 4.2
Burleigh Michael Hart LNP 4.9
Everton Tim Mander LNP 4.9
Moggill Christian Rowan LNP 5.0
Nicklin Marty Hunt LNP 5.3
Toowoomba North Trevor Watts LNP 5.7
Fairly safe
Callide Colin Boyce LNP6.1 v ONP
Mermaid Beach Ray Stevens LNP6.3
Oodgeroo Mark Robinson LNP7.2
Southport Rob Molhoek LNP7.2
Ninderry Dan Purdie LNP8.4
Maroochydore Fiona Simpson LNP8.5
Gympie Tony Perrett LNP8.7 v ONP
Hervey Bay Ted Sorensen LNP9.1
Warrego Ann Leahy LNP9.5 v KAP
Mudgeeraba Ros Bates LNP9.8
Safe
Toowoomba South David Janetzki LNP10.0
Burnett Stephen Bennett LNP10.7
Condamine Pat Weir LNP10.7 v ONP
Buderim Brent Mickelberg LNP11.4
Kawana Jarrod Bleijie LNP13.1
Scenic Rim Jon Krause LNP13.1 v ONP
Southern Downs James Lister LNP13.1 v ONP
Nanango Deb Frecklington LNP13.4 v ONP
Gregory Lachlan Millar LNP13.9 v ONP
Broadwater David Crisafulli LNP18.0
Surfers Paradise John-Paul Langbroek LNP19.8
CROSSBENCH SEATS (6)
Maiwar Michael Berkman GRN 1.6 v LNP
Mirani Stephen Andrew ONP 4.8 v ALP
Hinchinbrook Nick Dametto KAP 7.6 v LNP
Noosa Sandy Bolton IND11.5 v LNP
Hill Shane Knuth KAP 19.7 v LNP
Traeger Robbie Katter KAP 28.5 v ALP

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The following is a pendulum based on the outcome of the 2010 federal election and changes since, including the redistributions of seats in South Australia and Victoria. It is a Mackerras Pendulum, invented by psephologist Malcolm Mackerras, which works by lining up all of the seats held in Parliament according to the percentage point margin on a two-candidate-preferred basis. The two-party result is also known as the swing required for the seat to change hands. Given a uniform swing to the opposition or government parties in an election, the number of seats that change hands can be predicted. Swings are never uniform, but in practice variations of swing among the Australian states usually tend to cancel each other out. Seats are arranged in safeness categories according to the Australian Electoral Commission's (AEC) classification of safeness. "Safe" seats require a swing of over 10 per cent to change, "fairly safe" seats require a swing of between 6 and 10 per cent, while "marginal" seats require a swing of less than 6 per cent. The swings for South Australian and Victorian seats are notional, based on calculations by the AEC.

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The following is a Mackerras pendulum for the Victorian state election, 1999.

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The following is a Mackerras pendulum for the Victorian state election, 1996.

The following pendulum is known as the Mackerras Pendulum, invented by psephologist Malcolm Mackerras. Based upon the outcome of the 2007 federal election and changes before the 2010 election, the pendulum works by lining up all of the seats held in Parliament, 83 Labor, 55 Liberal, 9 National, and 3 independent, according to the percentage point margin on a two party preferred basis.

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