(Author here.) I'm very pleased to finally receive some feedback on the technical side! I will have to check out Least Trimmed Squares (and maybe other robust

(Author here.) I'm very pleased to finally receive some feedback on the technical side! I will have to check out Least Trimmed Squares (and maybe other robust regression techniques). For this dataset, I did try to exclude holidays, but it was difficult to define this exactly, so a more robust technique might indeed work better. And yes, it would be interesting to see what tags co-occur. Good ideas for a future post. Thanks!