GNP Differs from NNP Due to :
GNP (Gross National Product) differs from NNP (Net National Product) due to Depreciation.
Gross National Product (GNP) is the market value of all the products without deducting the depreciation of fixed capital. It is the total of gross value of final goods and services produced in a year.
Net National Product (NNP) is the value of net output in an economy of one year. The National Product is calculated by deducting depreciation from the gross national product.