Gross domestic product
Gross domestic product (GDP) is a monetary measure of the market value of all the final goods and services produced in a period of time, often annually 
GDP (nominal) per capita does not, however, reflect differences in the cost of living and the inflation rates of the countries; therefore using a basis of GDP per capita at purchasing power parity (PPP) is arguably more useful when comparing differences in living standards between nations.
Net material product
GDP began to be calculated in the USSR in 1988, based essentially on the United Nations System of National Accounts. The table compares the new GDP estimates with the traditional NMP numbers (in billions of current rubles). GDP is seen to be 25%–30% higher than NMP due to depreciation and the "non-productive" service sectors included in GDP but not in NMP.