So, how did my Poll of Polls do? Pretty rubbish really… The rapid rise of NZ First and the Conservatives during the last half of the campaign didn’t come through in my results, and there certainly seems to be something systemic about the Greens’ ability to fall short of their poll results come election day.

So, I’ve been playing around with the numbers, and have messed with my algorithm to produce what should (hopefully) be a more accurate beast. The changes involve further front-loading of the weighting of new polls (so that the Poll of Polls responds more quickly to meteoric rises a la NZ First and the Conservatives), updating the in-house polling bias offsets, and introducing industry bias offsets (to hopefully deal with issues such as the systematic overly high poll results for the Greens or the lower on average results for NZ First, compared to election day results).

The Poll of…