Technically, there's no "right way" to calculate inflation. Price level is only ever going to be an imperfect proxy, no matter how we measure it.
There are multiple official CPI values, too. Is that the one that excludes pretty much everything regular people spend their money on (food, shelter, energy, transportation)? If so, then it's no wonder the pre-83 method feels more accurate.
But there are a lot of “wrong ways” to calculate CPI 😂
Imagine the year is 2033. A Hershey's bar costs $39, the average home costs $2.7M, US Debt has crested $90T, and you're wondering why you didn't just buy more Bitcoin when it was under $100K.
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There's nothing but wrong ways to calculate CPI. There are just more and less relatable estimates.
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