Oddbean new post about login | logout @7418bc22 Well, the official reason the USG changes the way they count inflation is because people's spending habits change over the years. The weights are several pages down in this file https://www.bls.gov/news.release/pdf/cpi.pdf in Tables 1 and 2. That said, I still believe this http://www.shadowstats.com/alternate_data/inflation-charts more than the official numbers.