Multiple choice The consumer price index is designed to measure the degree to which incomes are distributed among the poor and rich over time the cost of purchasing a bundle of consumer goods has changed with time consumption patterns have changed with time because of higher prices consumer prices have risen, relative to wages Reveal answer Fill a bubble to check yourself B Correct answer Explanation The Consumer Price Index (CPI) measures the average change over time in the prices paid by urban consumers for a market basket of consumer goods and services.