Gregor Aisch @driven-by-data.net · Nov 29 For our German poll tracker we just added a similar chart, so you can see how close the average polls have been to the result in past elections. But another aspect of polling quality that is worth discussing further is how good the individual pollster have performed www.zeit.de/politik/deut...
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To compute our polling average, we're weighting polls by pollster quality. So far you could read about this in the methodology or if you're brave enough to study the #Rstats code we published alongside. With today's update we improved this metric by including another crucial factor: party bias!