Given the magnitude of the recent spike/fall in polls for the Greens/Conservatives, we were asking ourselves, whether such a spike might be a one-off and if approval rates are going to mean-revert any time soon? Looking at historical episodes of spikes in voter preferences indeed shows that most of the time, approval rates tended to (partly) mean revert after a couple of weeks. Still, the Greens clearly stand out with four out of the five most recent spikes working in their favour (hot and dry summer seasons '18 &'19, Fridays for Future movement, and disappointment with Covid measures). Where does that leave us with respect to the tight race in September?
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