The Parliamentary Library has released a new research paper on House of Representatives by-elections since 1901.
The paper is titled: House of Representatives by-elections: 1901-2015. It is writted by Stephen Barber of the Statistics and Mapping Section.
The paper is displayed below, in accordance with its Creative Commons licence.
The paper’s updated statistics show that the party complexion of a seat has changed on just 35 occasions out of 149 by-elections. The average two-party preferred swing against the government of the day has been 4.0 per cent.
Other data shows that that the average number of nominations for by-elections has grown from 2.2 to 11.6.
Of the 149 by-elections, 68 (45.6%) have occurred because of the death of the sitting member, whilst 75 (50.3%) were the result of resignation. Since 1980, 88.9% of all by-elections have been caused by resignation.
