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Problems with the Consumer Price Index (CPI) quiz

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  • What is substitution bias in the context of the Consumer Price Index (CPI)?
    Substitution bias occurs when consumers switch to cheaper goods, causing the CPI to underestimate the true rate of inflation.
  • How does substitution bias affect the measurement of inflation using CPI?
    It causes the CPI to report a lower inflation rate than the actual rate because it does not account for consumers buying cheaper alternatives.
  • What is new goods bias in the CPI?
    New goods bias happens when expensive new products are added to the CPI basket, which can make inflation appear higher than it actually is.
  • How did the introduction of personal computers in the 1990s illustrate new goods bias?
    When personal computers were added to the CPI basket, their high prices made it seem like electronics were getting more expensive, overstating inflation.
  • What is quality bias in the CPI?
    Quality bias occurs when changes in the quality of goods affect their prices, which can either understate or overstate inflation depending on whether quality decreases or improves.
  • How can quality bias cause the CPI to understate inflation?
    If goods become cheaper but also decrease in quality, the CPI may show lower inflation even though consumers are getting less value for their money.
  • How can quality bias cause the CPI to overstate inflation?
    If goods become more expensive due to improved quality, the CPI may show higher inflation even though consumers are getting better products.
  • Why does the CPI use a fixed basket of goods, and what problem does this create?
    The CPI uses a fixed basket to track price changes over time, but this can introduce bias because it doesn't account for changes in consumer behavior or new products.
  • What is an example of substitution bias in everyday shopping?
    When consumers switch from name brand to store brand groceries due to price increases, the CPI may underestimate inflation.
  • How does fast fashion contribute to quality bias in the CPI?
    Fast fashion leads to cheaper but lower quality clothing, which can make the CPI understate inflation as it appears clothing is getting less expensive.
  • How do new versions of cell phones illustrate quality bias?
    New cell phones are more expensive but also higher quality, so the CPI may overstate inflation by not fully accounting for the improved features.
  • Why is it important to understand the biases in the CPI?
    Understanding these biases helps interpret CPI data accurately, which is crucial for analyzing inflation and making economic policy decisions.
  • Who is responsible for adjusting the CPI to account for these biases?
    The Bureau of Economic Analysis works to adjust the CPI to minimize the effects of these biases.
  • Can quality bias both understate and overstate inflation? Explain.
    Yes, quality bias can understate inflation if quality decreases and overstate it if quality improves, depending on the direction of the quality change.
  • What is the main limitation of using a fixed basket of goods in the CPI?
    A fixed basket does not reflect changes in consumer preferences or the introduction of new products, leading to potential measurement biases.