Note: for a summary of all different potential Electoral Systems in BC, please use this link.

Alternative vote (AV), or otherwise known as Instant-runoff voting (IRV), has been used twice in BC’s history, in the 1952 and 1953 elections. Together with Single Transferable Vote (STV) and Proportional Representation (PR), it is one of the major electoral alternatives to the First Past the Post system currently used. Our Alternative Vote model attempts to calculate the hypothetical results of the 2013 BC Provincial Election under an AV system.

BC-AV

Clearly, the NDP performs significantly better in this model than in real life, possibly due to the shifting of Green voters to the NDP.

Examining the results Riding-by-riding:

Maps of BC under the system can also be found below:

The dot indicates the 2013 FPTP result, while the shading of the district indicates the result under Alternate Vote.

For comparisons to other electoral systems, see here.

Assumptions

Of all Conservative voters, we estimated that 70% would have the Liberals as their second choice, and 30% would prefer an independent as their second choice. For Liberal voters, we anticipated that 70% would prefer the Conservatives next, and 30% would prefer the NDP. For NDP voters, we anticipated that 30% would prefer the Liberals, and 70% the Green party. For Green voters, 70% of the second-place votes went to the NDP, and 30% to an independent candidate. Out of the independent candidates, we anticipated that 60% would have Greens as their second choice, and 40% would have Conservatives.