19 September, 2005
Keepleftnz.org wins comprehensive victory in polling battle
Keepleftnz.org’s sophisticated poll of polls and its industry-leading poll of poll of polls predicted the on-the-night
election result better than all the major polling organisations.
“On average, we only got parties vote shares wrong by half of one percent. And we were never wrong by more that 1.1%.
And in our poll of poll of polls, we got within 0.2% for both Labour and National. We rule!” sang John, Paul, and
George, more or less in unison.
“Our methods for aggregating polls, and even for aggregating rolling polls, cut through the volatility and vacillation
from one poll to the next. We produced an accurate picture of New Zealand’s underlying political attitudes” said a
Keepleftnz’s poll of polls used data from all polls over the previous four-week period, weighted to give recent polls
and larger polls more influence over the final predictions.
Yoko beamed: “This is a huge victory for the little guys and gals. Why pay many thousands for a market research company
to do political research when you can see ours for free?”
In other news, the price of accessing keepleftnz’s poll of polls is rumoured to increase shortly from zero to “many
Table: Poll results released in the last week of the campaign
Polling Organisation Average Error Average Major Party Error Largest Error
Fairfax (Wed) 1.56% 3.56% 3.74%
Morgan (Thu) 1.45% 2.44% 2.63%
NZ Herald (Fri) 1.22% 3.05% 3.86%
TV1 (Thu) 1.19% 3.56% 4.37%
TV3 (Thu) 0.78% 0.58% 1.83%
Poll of Polls (as published) 0.63% 0.76% 1.13%
Poll of Polls (updated) 0.46% 0.40% 0.99%
Poll of Poll of Polls 0.50% 0.11% 1.10%
1. The “errors” are calculated using the absolute differences between the predicted and actual (on the night) party vote
percentages for Labour, National, New Zealand First, Green, United Future, ACT, and the Maori Party. Major party errors
refer to Labour and National.
2. The keepleftnz poll of polls as published on 16/9 did not include the results of the Herald’s poll in its
calculations. The updated poll of polls simply adds the Herald’s results into the mix using the usual method.