> Responding to prior criticisms made by economist James Hamilton, John Williams explained in a private phone call that Shadowstats does not actually recalculate BLS data, rather, the Shadowstats CPI merely adds a constant to the officially reported numbers.[28]
I briefly scanned the BPP data and it was pretty close to the official CPI. The BPP is usually a bit higher, and for a short time noticeably higher, but they generally converge.
If you actually stop and think about it for a couple seconds, you should realize immediately that a “secret” inflation rate of 10% is impossible. You can lie about that for a month or two, but 10% annual inflation means prices double every 7 years, which is obviously not what we observe.
https://www.perplexity.ai/search/what-is-the-us-inflation-ra...