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Hi! I've observed some odd patterns in the Veraset data and I would like some help with the following questions.

I constructed a measure of time at home per device from January 2019- May 2025. From 2019-2022 I have used Veraset Visits only, and after 2023 I have started additionally adding the Home Visits because the data is split up.

1. The documentation says that "Starting in 2022, home and work visits were split into separate datasets due to privacy requirements." - I believe this actually starts in 2023. I can only download Veraset home visits starting in 2023.
2. I find some unusual patterns in the data starting in 2022, and I have been so far focused on Cook County, IL:
   1. The number of devices first declines throughout 2019, 2020, and 2021, then spikes at a few dates in early 2022 and late 2021, and finally remains low starting in 2022
   2. The total time at home observed across all devices follows a logical pattern between 2019 January and 2022 January but then dips a lot in 2022. This seems to be driven by devices which are only observed for a short time period at home.
   3. There are outliers in the time-spent-at home data , for example on Saturday, December 4 2021 the average time at home before 4am drops, and this drop is driven by outliers that spend less than 30 minutes total time at home
   4. A few days have a large spike in the number of devices observed (I believe April 22 or April 23 2022 are such examples).

Can you please help with this?