Post-election pendulum for the 2007 Australian federal election
The following pendulum is known as the Mackerras pendulum, invented by psephologist Malcolm Mackerras. Designed for the outcome of the 2007 federal election, the pendulum works by lining up all of the seats held in Parliament, 83 Labor, 55 Liberal, 10 National, and 2 independent, according to the percentage point margin on a two candidate preferred basis, as elected in 2007.
Source: Wikipedia — Post-election pendulum for the 2007 Australian federal election (CC BY-SA 4.0)