Electoral disproportionality and bias under the alternative vote: Elections to Australia's House of Representatives

Studies of electoral disproportionality and bias under Australia's alternative electoral system have mainly relied on the two-party preferred (2PP) vote totals for all electorates, irrespective of whether these are needed to determine the election outcome there. We argue that separate analyses should be undertaken for two groups of electorates - where the determination is made using the first-preference (FP) votes and where the 2PP redistributed votes are needed because no candidate wins a majority of FP votes, illustrating this with an analysis of the 2007 House of Representatives election results.