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46 sats \ 0 replies \ @Undisciplined 4 Sep \ on: The Quality of CPI Data Continues to Deteriorate - Apollo Academy econ
In recent months, they've likely lost a lot of the staff who would gather data. Also, there's an ongoing trend of declining survey response rates, so researchers have to either increase sample sizes or do more imputation.
They're probably relying on outdated methods, as well, and could take better advantage of how many prices are listed online.