Net Domestic Product differs from Gross Domestic Product because the former:
excludes imports and exports. excludes depreciation. includes transfer payments. includes the value of nonmarketed production.
Paul Puma has spent the summer repainting his own house. If he had hired a contractor to do the job, it would have cost him $2500. How do the U.S. GDP statistics count his production of house painting?
They include it as $2500 of consumption spending and $2500 of proprietors' income. They include it as $2500 of consumption spending and $2500 of employee compensation. They include it as $2500 of investment spending and $2500 of proprietors' income. They do not count it all because it is a non-market transaction.