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.
The OECD defines GDP as "an aggregate measure of production equal to the sum of
the gross values added of all resident and institutional units engaged in
production (plus any taxes, and minus any subsidies, on products not included
in the value of their outputs).An IMF publication states that "GDP measures the
monetary value of final goods and services - that are bought by the final user
produced in a country in a given period of time (say a quarter or a year).
Total GDP can also be broken down into the contribution of each industry or
sector of the economy. The ratio of GDP to the total population of the region
is the per capita GDP and the same is called Mean Standard of Living. GDP is
considered the "world's most powerful statistical indicator of national
development and progress".
原文比较好解释, 不知道不懂的是哪个部分呢?