5. Limitations of GDP Although GDP is a reasonably good measure of a nation's output, it does not necessarily include all transactions and production for that nation. Which of the following scenarios are either not accounted for or measured inaccurately by either the income or the expenditure methods of calculating GDP for the United States? Check all that apply. Expenditures on federal highways The costs of air and water pollution D The value of babysitting services, when the babysitter is paid in cash and the transaction isn't reported to the government C] The quality of goods available to consumers