National income (at market prices)
Gross national income (at market prices) equals GDP minus primary income
payable by resident units to non-resident units plus primary income receivable by
resident units from the rest of the world.
Gross national income (at market prices) is conceptually identical with gross
national product (GNP) (at market prices), as hitherto understood in national
accounts generally.
However, the GNP was calculated differently in 1979 ESA
National income is not a production concept but an income concept, which is
more significant if expressed in net terms, i.e. after deduction of the
consumption of fixed capital.