Define the three factors (political, sociological and institutional) which affect Australian Elections?

Institutional factors: Institutional factors relate to the type of the electoral system used in an election. Institutional factors that can influence the election include compulsory voting, the type of ballot, gerrymanders and malapportionment. Compulsory voting ensures 95 per cent of Western Australians participate in elections. However, it has been echoed by some academics that compulsory voting favors major parties. This is due to few people doing their own research into political parties and voting for parties …

…to decide on political parties. However, recent pools suggest that media being so influential is overrated. This is due to free to air media needing to gain ratings to sell advertising. Thus, if a political party is unpopular it would not be in the media's best interest to support the party. As the media could potentially lose ratings. It is echoed by John Willmott that media doesn't set political opinion it just merely enforces it.