Discussions

In Advan's Weekly Patterns Plus, we are running into what appears to be double-counting of visits for some POIs only during 2023-2024.

In particular, we downloaded the latest data on Dewey on February 1, 2026. We plotted total weekly visits during nighttime hours (visits starting in the hours 5pm to 11pm, inclusive, using VISITS_BY_EACH_HOUR) to ID_STORE 12082835 (Girl and the Goat in Chicago). With that data, we get this figure:

As you can see, a large increase in visits begins in 2023, then drops down through 2024. From our knowledge of the restaurant, we have no reason to think this increase really happened (it is implausibly large).

In the old data (which we downloaded from Dewey on October 22, 2025), we see pretty stable visit levels through 2023 and 2024:

We asked Advan directly about this issue, and in their current data they see a figure that looks much more like our old figure (just without the gap in 2018) -- that is, they do not see any spike in 2023 and 2024. I used the exact same code to produce both figures, so it appears that the issue comes from the data. Any insight you have would be much appreciated, and let me know if I can provide any further details.

(I'm not sure if it's showing my name but this is Victoria again.)