National income estimates will be understated as a result of the activities of

Step 1: Analyze the question The question asks which activity causes national income estimates to be understated, meaning the recorded figure is lower than the true value of output.

Step 2: Explain the concept National income is calculated by adding up the value of goods and services produced and recorded in the market. Some activities are left out or poorly captured, and these cause understatement. Common examples are:

• Subsistence farming, where output is consumed at home and not sold, so it is not recorded.
• Unpaid housework done by family members.
• Black-market and informal activities that are not reported.
• Barter trade.

Step 3: Evaluate each option

• A. Subsistence farmers: They produce mainly for their own consumption, so most of their output never passes through the market and is not recorded. This understates national income. ✔
• B. Musicians: Their services are paid for, recorded, and often taxed, so they are included.
• C. Laundry women: These are paid services. They may be informal in some cases, but the textbook answer is not this option.
• D. Housekeepers: Paid housekeepers earn wages, so their services are counted. It is unpaid housework by family members that is excluded, and the option does not say that.

Step 4: Answer The correct option is **A.

Tip: Remember the phrase "not sold, not counted". If output is consumed by the producer and never enters the market (subsistence farming, unpaid housework), it is usually left out of national income, which causes understatement.