Household production vs. market services in GDP measurement

Steps:

• GDP measures the market value of final goods and services produced in an economy.
• Decorating one's own house counts as household production, which is not included in GDP.
• Hiring a professional shifts the activity to a paid market transaction.
• This transaction adds the decorator's fee to GDP as consumption expenditure.

Why A is correct:

• GDP includes income earned from market activities; the decorator's payment records as their income, directly contributing to national income accounting.

Why the others are wrong:

• B: Leisure time does not generate measurable economic output for GDP.
• C: Discounts on materials affect costs but not the overall GDP contribution from the service.
• D: Efficiency impacts productivity but not whether the activity enters GDP calculations.

Final answer: A