As of November 2011, this website is no longer being kept uptodate. It contains NZ Parliament debates from November 2005 to November 2011. is volunteer run, and has been in operation since November 2006.

How closely did parties vote on bills in the 49th Parliament?

By analysing party voting on final bill readings, we can see how parties differ when it comes to legislation passed during the 49th New Zealand Parliament.

The closer two parties are on the graphic, the more often they voted the same way in final bill readings. The distances between the parties is calculated based on their votes. The axes don't have any special meaning, it's the distances between parties that explains similarity in their voting.


The plot was created by a statistical analysis of bill votes, using a technique called principal components analysis. The two principal components plotted above explain 83.2% of the variance in the way parties voted on final bill readings.

You can read a blog post for details of how to do the principal components analysis for yourself. The data is provided.

How often did NZ political parties agree on bills?

National ACT United Future Māori Party Labour Progres- sive Green
Logo for The New Zealand National Party 87% 90% 50% 42% 40% 8%
Logo for ACT New Zealand 87% 78% 40% 38% 36% 6%
Logo for United Future New Zealand 90% 78% 58% 52% 47% 18%
Logo for Māori Party 50% 40% 58% 57% 50% 48%
Logo for New Zealand Labour Party 42% 38% 52% 57% 85% 65%
Logo for Jim Anderton's Progressive 40% 36% 47% 50% 85% 52%
Logo for The Greens, The Green Party of Aotearoa/New Zealand 8% 6% 18% 48% 65% 52%

Each number is the percentage of final bill reading votes where two parties voted in the same way.

Frequently Asked Questions

Can you give me an example to explain the percentage?

For example, if you look at the row for the Green Party, you can see the Green Party and National voted in the same way in 8% of the final bill readings, the Green Party and Labour voted in the same way in 65% of the readings.

Can I see the bills that parties agreed on?

You can see the bills that two parties agreed or disagreed on by clicking on the table above. There is a page for each two party combination, for example:

Is there an explanation for the patterns in voting?

The National Party has the following agreements with other parliamentary parties in the 49th Parliament: a confidence and supply agreement with ACT; a confidence and supply agreement with the Māori Party; and a confidence and supply agreement with United Future.

Which bill reading votes are included?

There are 130 final bill reading votes included in the analysis. All the votes are from the 49th New Zealand Parliament which has been in term since 8 Dec 2008.

What did you consider to be a 'final' bill reading vote?

Included in the analysis are 101 bill third reading party votes. If parliament passes a bill's third reading, the bill moves on to receive royal assent and become law. Also included in the analysis are 29 first and second reading party votes where parliament voted against the reading of the bill.

What did you do with personal votes?

Any final bill reading votes that were personal votes of conscience are excluded from the analysis.

Did the parties vote on every bill third reading?

Parliament passes some bill third readings without a vote, these were excluded from the analysis.

How do I report a mistake or give feedback?

If you have found an error, or have feedback, please send an email to:
rob at they work for you dot co dot nz is a volunteer project — please be understanding if you spot mistakes. Errors will be corrected as soon as possible.

How can I help?

Please blog, 'tweet', facebook-share and email this party comparison if you find it useful!

What else is on this website?

You can view parliamentary debates grouped by their relationship to bills, ministerial portfolios, MPs or organisations.