Components of Consumer Price Index Construction

Steps:

• Recall that a Consumer Price Index (CPI) tracks average price changes for a basket of consumer goods and services over time.
• Identify essential steps: choose a base period for comparison, select representative items, assign weights based on spending patterns, and compute the index.
• Evaluate each option against CPI methodology to find the unrelated element.
• Confirm that wage calculations belong to labor economics, not price indexing.

Why C is correct:

• CPI construction focuses on price levels of goods and services, not wage computations, which are used in separate indices like real wage adjustments.

Why the others are wrong:

• A: A base year is required to establish a reference point for percentage changes in prices.
• B: A representative basket of items is essential to reflect typical consumer spending.
• D: Weighting items by expenditure proportions ensures the index accurately represents the cost of living.

Final answer: C