Pre-election pendulum for the 2019 Australian federal election

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At the 2016 federal election of the 150 House of Representatives seats the Liberal/National Coalition won 76, a one-seat majority, Labor won 69 seats and crossbenchers won the remaining five. A redistribution in 2017/18 changed the representation entitlements. For the next election, the number of seats in the House will increase to 151, South Australia will lose a seat, Victoria and the Australian Capital Territory (ACT) will gain one seat each.

Contents

The following Mackerras pendulum shows the notional margins for seats following boundary redistributions in Victoria, Queensland, South Australia, Tasmania, the Northern Territory and the ACT. Based on ABC analyst Antony Green's calculations of the effect of boundary redistributions for the next election, [1] and the outcome of the 2018 Wentworth by-election, the pendulum has the Coalition government on 73 of 151 seats with the Labor opposition on 72 seats and a crossbench of six seats. [1]

Assuming a theoretical nationwide uniform swing, the Labor opposition would need at least 50.7% of the two-party vote (at least a 1.1-point two-party swing) to win 76 seats and majority government. The incumbent Coalition government no longer holds a majority, and would require at least 51.1% of the two-party vote (at least a 0.7-point two-party swing) to regain it.

State of electorates

The following Mackerras pendulum lists seats in the House of Representatives according to the percentage-point margin they held on a two candidate preferred basis based on the 2016 election results. This is also known as the swing required for a seat to change hands.

Classification of seats as marginal, fairly safe or safe is applied by the independent Australian Electoral Commission using the following definition: "Where a winning party receives less than 56% of the vote, the seat is classified as 'marginal', 56–60% is classified as 'fairly safe' and more than 60% is considered 'safe'." [2]

Government seats - 2016 (73)
SeatMemberPartyMargin
Marginal
Capricornia (Qld) Michelle Landry LNP50.6
Forde (Qld) Bert van Manen LNP50.6
Gilmore (NSW) Ann Sudmalis LIB50.7
Flynn (Qld) Ken O'Dowd LNP51.0
^^^ Opposition wins majority on a uniform swing ^^^
Robertson (NSW) Lucy Wicks LIB51.1
Banks (NSW) David Coleman LIB51.4
Petrie (Qld) Luke Howarth LNP51.6
Dickson (Qld) Peter Dutton LNP52.0
Hasluck (WA) Ken Wyatt LIB52.1
Page (NSW) Kevin Hogan NAT52.3
Boothby (SA) Nicolle Flint LIB52.8
Dawson (Qld) George Christensen LNP53.3
Chisholm (Vic) Julia Banks (IND)LIB52.9
Bonner (Qld) Ross Vasta LNP53.4
La Trobe (Vic) Jason Wood LIB53.5
Pearce (WA) Christian Porter LIB53.6
Swan (WA) Steve Irons LIB53.6
Leichhardt (Qld) Warren Entsch LNP54.0
Casey (Vic) Tony Smith LIB54.5
Cowper (NSW) Luke Hartsuyker NAT v IND54.6
Reid (NSW) Craig Laundy LIB54.7
Sturt (SA) Christopher Pyne LIB55.8
Brisbane (Qld) Trevor Evans LNP56.0
Fairly safe
Stirling (WA) Michael Keenan LIB56.1
Deakin (Vic) Michael Sukkar LIB56.1
Canning (WA) Andrew Hastie LIB56.8
Bowman (Qld) Andrew Laming LNP57.1
Flinders (Vic) Greg Hunt LIB57.2
Aston (Vic) Alan Tudge LIB57.6
Menzies (Vic) Kevin Andrews LIB57.9
Monash (Vic) Russell Broadbent LIB58.0
Higgins (Vic) Kelly O'Dwyer LIB v GRN58.0
Wide Bay (Qld) Llew O'Brien LNP58.3
Hinkler (Qld) Keith Pitt LNP58.4
Grey (SA) Rowan Ramsey LIB58.5
Ryan (Qld) Jane Prentice LNP58.8
Fisher (Qld) Andrew Wallace LNP59.2
Hughes (NSW) Craig Kelly LIB59.3
Wannon (Vic) Dan Tehan LIB59.3
Wright (Qld) Scott Buchholz LNP59.6
Bennelong (NSW) John Alexander LIB59.7
Safe
Hume (NSW) Angus Taylor LIB60.2
Fairfax (Qld) Ted O'Brien LNP61.0
Moore (WA) Ian Goodenough LIB61.0
Durack (WA) Melissa Price LIB61.1
Tangney (WA) Ben Morton LIB61.1
Fadden (Qld) Stuart Robert LNP61.2
Warringah (NSW) Tony Abbott LIB v GRN61.6
Lyne (NSW) David Gillespie NAT61.6
McPherson (Qld) Karen Andrews LNP61.6
Calare (NSW) Andrew Gee NAT61.8
Forrest (WA) Nola Marino LIB62.6
Goldstein (Vic) Tim Wilson LIB62.7
Kooyong (Vic) Josh Frydenberg LIB62.8
North Sydney (NSW) Trent Zimmerman LIB63.6
Barker (SA) Tony Pasin LIB64.3
Moncrieff (Qld) Steven Ciobo LNP64.5
O'Connor (WA) Rick Wilson LIB65.0
Parkes (NSW) Mark Coulton NAT65.1
Groom (Qld) John McVeigh LNP65.3
Cook (NSW) Scott Morrison LIB65.4
Mackellar (NSW) Jason Falinski LIB65.7
Maranoa (Qld) David Littleproud LNP v ONP65.9
Berowra (NSW) Julian Leeser LIB66.4
New England (NSW) Barnaby Joyce NAT66.4
Riverina (NSW) Michael McCormack NAT66.4
Mitchell (NSW) Alex Hawke LIB67.8
Gippsland (Vic) Darren Chester NAT68.2
Mallee (Vic) Andrew Broad NAT69.8
Farrer (NSW) Sussan Ley LIB70.5
Curtin (WA) Julie Bishop LIB70.7
Bradfield (NSW) Paul Fletcher LIB71.0
Nicholls (Vic) Damian Drum NAT72.3
Opposition seats - 2016 (72)
SeatMemberPartyMargin
Marginal
Herbert (Qld) Cathy O'Toole ALP50.02
Corangamite (Vic) Sarah Henderson (LIB)ALP50.03
Cooper (Vic) Ged Kearney ALP v GRN50.6
Cowan (WA) Anne Aly ALP50.7
^^^ Government regains majority on a uniform swing ^^^
Longman (Qld) Susan Lamb ALP50.8
Lindsay (NSW) Emma Husar ALP51.1
Dunkley (Vic) Chris Crewther (LIB) [a] ALP51.3
Macnamara (Vic) Michael Danby ALP51.3
Griffith (Qld) Terri Butler ALP51.4
Braddon (Tas) Justine Keay ALP51.5
Macquarie (NSW) Susan Templeman ALP52.2
Isaacs (Vic) Mark Dreyfus ALP52.3
Eden-Monaro (NSW) Mike Kelly ALP52.9
Perth (WA) Patrick Gorman ALP53.3
Bendigo (Vic) Lisa Chesters ALP53.9
Lyons (Tas) Brian Mitchell ALP54.0
Moreton (Qld) Graham Perrett ALP54.0
Richmond (NSW) Justine Elliot ALP54.0
Hotham (Vic) Clare O'Neil ALP54.2
Dobell (NSW) Emma McBride ALP54.8
Wills (Vic) Peter Khalil ALP v GRN54.9
Jagajaga (Vic) Jenny Macklin ALP55.0
Bass (Tas) Ross Hart ALP55.3
McEwen (Vic) Rob Mitchell ALP55.3
Lilley (Qld) Wayne Swan ALP55.8
Fairly safe
Solomon (NT) Luke Gosling ALP56.1
Greenway (NSW) Michelle Rowland ALP56.3
Burt (WA) Matt Keogh ALP57.1
Ballarat (Vic) Catherine King ALP57.4
Fremantle (WA) Josh Wilson ALP57.5
Parramatta (NSW) Julie Owens ALP57.7
Blair (Qld) Shayne Neumann ALP58.0
Lingiari (NT) Warren Snowdon ALP58.1
Hindmarsh (SA) Steve Georganas ALP58.2
Werriwa (NSW) Anne Stanley ALP58.2
Barton (NSW) Linda Burney ALP58.3
Macarthur (NSW) Mike Freelander ALP58.3
Corio (Vic) Richard Marles ALP58.3
Kingsford Smith (NSW) Matt Thistlethwaite ALP58.6
Bean (ACT) Gai Brodtmann ALP58.9
Adelaide (SA) Kate Ellis ALP59.0
Oxley (Qld) Milton Dick ALP59.1
Maribyrnong (Vic) Bill Shorten ALP59.4
Shortland (NSW) Pat Conroy ALP59.9
Holt (Vic) Anthony Byrne ALP59.9
Safe
Franklin (Tas) Julie Collins ALP60.7
Paterson (NSW) Meryl Swanson ALP60.7
Makin (SA) Tony Zappia ALP60.9
Rankin (Qld) Jim Chalmers ALP61.3
Brand (WA) Madeleine King ALP61.4
Fenner (ACT) Andrew Leigh ALP61.6
McMahon (NSW) Chris Bowen ALP62.1
Hunter (NSW) Joel Fitzgibbon ALP62.5
Canberra (ACT) new seatALP63.2
Cunningham (NSW) Sharon Bird ALP63.3
Kingston (SA) Amanda Rishworth ALP63.5
Whitlam (NSW) Stephen Jones ALP63.7
Newcastle (NSW) Sharon Claydon ALP63.8
Lalor (Vic) Joanne Ryan ALP64.4
Gellibrand (Vic) Tim Watts ALP64.7
Sydney (NSW) Tanya Plibersek ALP65.3
Bruce (Vic) Julian Hill ALP65.7
Grayndler (NSW) Anthony Albanese ALP v GRN65.8
Fowler (NSW) Chris Hayes ALP67.5
Watson (NSW) Tony Burke ALP67.6
Spence (SA) Nick Champion ALP67.9
Gorton (Vic) Brendan O'Connor ALP68.3
Chifley (NSW) Ed Husic ALP69.2
Blaxland (NSW) Jason Clare ALP69.5
Calwell (Vic) Maria Vamvakinou ALP70.1
Scullin (Vic) Andrew Giles ALP70.4
Fraser (Vic) New seatALP70.6
Crossbench seats - 2016 (6)
SeatMemberPartyMargin
Wentworth (NSW) Kerryn Phelps IND51.2 v LIB
Indi (Vic) Cathy McGowan IND54.1 v LIB
Mayo (SA) Rebekha Sharkie CA55.5 v LIB
Kennedy (Qld) Bob Katter KAP61.1 v LNP
Clark (Tas) Andrew Wilkie IND67.8 v ALP
Melbourne (Vic) Adam Bandt GRN69.0 v LIB

Notes

a Although the seats of Corangamite and Dunkley were Liberal wins at the previous election, the redistribution in Victoria changed them to notionally marginal Labor seats.

b Julia Banks won Chisholm as a Liberal candidate, and quit the Liberal party to sit as an Independent. She is not recontesting Chisholm, but she is instead contesting Flinders.

c Bean entirely consists of area from the pre-redistribution Canberra and can be considered a renaming of the seat, while the post redistribution seat of Canberra contains approximately as many voters from pre-redistribution Fenner as Canberra, and can be considered a new seat.

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2017 Western Australian state election

The 2017 Western Australian state election was held on Saturday 11 March 2017 to elect members to the Parliament of Western Australia, including all 59 seats in the Legislative Assembly and all 36 seats in the Legislative Council. The eight-and-a-half-year two-term incumbent Liberal–WA National government, led by Premier Colin Barnett, was defeated in a landslide by the Labor opposition, led by Opposition Leader Mark McGowan.

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.

The following is a Mackerras pendulum for the 2014 Victorian state election.

The Coalition won the 2013 federal election with 90 of 150 lower house seats on a current 17-seat, 3.65-point two-party swing, defeating the 6-year Labor government. Labor holds 55 seats while crossbenchers hold the remaining five. The Division of Fairfax was the last seat to be declared.

This is a Mackerras pendulum for the 2016 Australian federal election.

2019 Australian federal election Election for the 46th Parliament of Australia

The 2019 Australian federal election was held on Saturday 18 May 2019 to elect members of the 46th Parliament of Australia. The election had been called following the dissolution of the 45th Parliament as elected at the 2016 double dissolution federal election. All 151 seats in the House of Representatives and 40 of the 76 seats in the Senate were up for election.

The Coalition won the 2016 federal election with a one-seat majority 76 of 150 lower house seats. Labor holds 69 seats while crossbenchers hold the remaining five.

The Labor party won the 2018 state election by winning 55 of the 88 lower house seats. The coalition won 27 seats while the Greens and independents won 3 each.

The Coalition won the 2019 federal election with a three-seat majority of 77 of 151 lower house seats. Labor holds 68 seats, and crossbenchers hold the remaining six.

References

  1. 1 2 Green, Antony. "2017–18 Federal Redistributions". ABC Elections. Australian Broadcasting Corporation. Retrieved 25 August 2018.
  2. Division Classifications, Virtual Tally Room 2016, Australian Electoral Commission. Retrieved 21 August 2016.