Which of the following is NOT a source of bias in the CPI?
i. quality change bias
ii. new goods bias
iii. quantity change bias
Answer is 3. Quantity change bias.
Change in quantity of goods is measured in CPI and this does not create any problem in measurement. But change in quality is not measured and there is no phenomenon in CPI to consider the change in quantities of goods and other is new goods also enter the market regularly but CPI calculates the price level of only those goods which have listed in CPI basket.
So quantity change is not a bias.
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