I put this in the bullion area because the CPI affects everything from union contracts to SS income to retirement payments.
We've heard that the way the gubmint calculates it has changed, but I never heard specifics. Here you go:
Quote:
The geometric mean formula, though, does not account for consumer substitution taking place between CPI item categories. For example, pork and beef are two separate CPI item categories. If the price of pork increases while the price of beef does not, consumers might shift away from pork to beef. The C-CPI-U is designed to account for this type of consumer substitution between CPI item categories. In this example, the C-CPI-U would rise, but not by as much as an index that was based on fixed purchase patterns.
IOW, if you have to pay 20% more for pork chops, your cost of living didn't really go up at all, because you can eat beef instead. Then when beef goes up 20%, you can switch to chicken, with no increase in the CPI.
No word on what you substitute for beans and rice. Sounds like "let them eat cake" to me.
The last sentence basically says that they're coming up with a still newer way to calculate the CPI, which will show even less inflation.
When I read that explanation, I thought major

?
Common sense says a number to compare cost of living at different dates would compare the
same living, not the cost or maintaining a bicycle instead of a car, or rooming instead of having an apartment.
Essentially, all the new CPI says is "if you cut back, it only costs a little more than it used to. How little is determined by how much you cut back."