A small house effect

A house effect, in polling terms, is the measurement of whether polls form one company for a party differ from the average of all the other polls for that party. It isn’t bias, it is just saying this is how far from the average a polling company is.

The Overhang calculates house effects every few months, and has just done an update. It shows:

So for all seven parties, Curia has a deviation from the industry average of less than 1%, and less than 0.5% for all but the Greens.