Whose Consumer Price Index?

This post (an update of this) focuses on issue separate from the mathematics of the index formulation, and has to do with what the typical weights at any given instant in time should pertain to. Should one use the expenditure weights that pertain to all the households aggregated in the economy? Or should one use the expenditure weights that pertain to the “typical” household? Kokoski (2003) [updated link] summarizes the distinction thus:

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CPI Skepticism

Every few years, skepticism of officially calculated inflation rates surges, so it seems a good idea to now recap how the CPI measures (and mis-measures) the cost of living, remembering that in the absence of knowledge of the “true” utility function of the “representative agent”, one can’t know the correct approach.

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