The income earned by a countrys people, including labor and capital investment.
The sum of all incomes, net of consumption of fixed capital (CFC), earned in production. Includes both factor incomes and nonfactor charges. It formerly excluded nonfactor charges.
The income generated by a country's production, and therefore the total income of its factors of production. Except for some adjustments that don't usually enter theoretical models, NI is the same as GDP.