> 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.[25]

>> I’m not going back and recalculating the CPI. All I’m doing is going back to the government’s estimates of what the effect would be and using that as an add factor to the reported statistics

Same article says he charges $175/year/subscription since 2006.

I'd love to get paid that much to do a high school level introductory programming assignment. The business logic is literally a one liner X-D