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

Out of all proposed electoral systems, Single Transferable Vote (STV) has attained the most influence or fame in recent times, largely due to the two failed referendums in 2005 and 2009 to change the system. Under STV, BC would be grouped into multi-member districts, with each voter ranking the candidates in the district in order of preference. The candidates which reached a certain amount of support would win a seat in the riding, and have his/her votes redistributed to other candidates.

Our model used the results of the 2013 provincial election to find out what the electoral landscape would have looked like in if the election had been conducted under STV. The model used the proposed boundaries provided by Elections BC.

BC-STV

In contrast to Alternative Vote, and the existing First-Past-the-Post system, STV retains rough proportionality between the major parties. However, minor parties are still underrepresented, most likely due to district sizes being too small for most to reach the threshold. However, it is important to note that the model take into account the fragmentation of parties that might have happened under a STV system.

Analyzing the proportionality of STV:

Party Popular Vote Seats Seat % Deviation
Liberals 44.13% 43 50.59% +6.46%
NDP 39.72% 38 44.71% +4.99%
Green 8.14% 2 2.35% -5.79%
Conservatives 4.75% 1 1.18% -3.57%
Independents 3.26% 1 1.18% -2.08%

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.