For some racquet sports there have been increases in the size of the racquets;also,the methods and materials used for making racquets have improved.To which problem in the construction of the CPI are these facts most relevant?

Question

Quizplus · Accepted Answer

These facts are most relevant to the problem of unmeasured quality change in the construction of the Consumer Price Index (CPI). The changes in size and materials used in making racquets improve the quality of the product, which means that consumers are getting more value for their money even if the price of the racquets remains the same. This can lead to an overestimation of inflation if it is not properly accounted for in the CPI.

For Some Racquet Sports There Have Been Increases in the Size