2011 referendum simulator

This page calculates the composition of Parliament corresponding to a given polling scenario, under each of the five electoral systems considered in the 2011 New Zealand referendum.

Enter the overall support level for each party in the form, and push the Calculate button.

(The "Others" box is automatically adjusted to make the total 100%.)

National Party %

Labour Party %

Green Party %

New Zealand First Party %

ACT New Zealand %

Maori Party %

Progressive %

United Future %

%

%

Others

Total 100 %

Auto-fill with the party vote from past elections:

Assumptions, explanations, parameters, and general discussion (see also the FAQ):

MMP
Minor parties' electorate seats:

Green

NZ First

ACT

Maori

Progressive

United

Threshold: %
Threshold exemption for parties with electorate seats:

First Past The Post
Requires 120 electorates, each with one MP.
Preferential Voting
Requires 120 electorates, each with one MP.
Requires assumptions about voter preferences.

Single Transferable Vote
Requires 24-30 electorates of various sizes, represented by 3-7 MPs per electorate.
Requires assumptions about voter preferences.

Supplementary Member
Requires 90 electorates, each with one MP.
A further 30 MPs are elected from party lists.

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